Scientists cannot devise theories, construct models, propose explanations, make predictions, or even carry out observations, without first classifying their subject matter. The goal of scientific taxonomy is to come up with classification schemes that conform to nature's own. Another way of putting this is that science aims to devise categories that correspond to 'natural kinds.' The interest in ascertaining the real kinds of things in nature is as old as philosophy itself, but it takes on a different guise (...) when one adopts a naturalist stance in philosophy, that is when one looks closely at scientific practice and takes it as a guide for identifying natural kinds and investigating their general features. This Element surveys existing philosophical accounts of natural kinds, defends a naturalist alternative, and applies it to case studies in a diverse set of sciences. This title is also available as Open Access on Cambridge Core. (shrink)

Classification of certain group-like FL $_e$ -chains is given: We define absorbent-continuity of FL $_e$ -algebras, along with the notion of subreal chains, and classify absorbent-continuous, group-like FL $_e$ -algebras over subreal chains: The algebra is determined by its negative cone, and the negative cone can only be chosen from a certain subclass of BL-chains, namely, one with components which are either cancellative (that is, those components are negative cones of totally ordered Abelian groups) or two-element MV-algebras, and with (...) no two consecutive cancellative components. It is shown that the classification theorem does not hold if we drop the absorbent-continuity condition. Our result is the first classification theorem in the literature on FL $_e$ -algebras that does not assume the condition of being naturally ordered (which, under certain conditions, corresponds to continuity of the monoid operation). In our classification theorem, continuity is replaced by the much weaker absorbent-continuity. (shrink)

In this brief paper, starting from recent works, we analyze from conceptual point of view this basic question: can be the nature of quantum entangled states interpreted ontologically or epistemologically? According some works, the degrees of freedom of quantum systems permit us to establish a possible classification between factorizables and entangled states. We suggest, that the "choice" of degree of freedom, even if mathematically justified introduces epistemic element, not only in the systems but also in their classification. We (...) retain, instead, that there are not two classes of quantum states, entangled and factorizables, but only a single classes of states: the entangled states. In fact, the factorizable states become entangled for a different choice of their degrees of freedom. In the same way, there are not partitions of quantum system which have an ontological superior status with respect to any other. For all these reasons, both mathematical tools utilized are responsible of improper classification of quantum systems. Finally, we argue that we cannot speak about a classification of quantum systems: all the quantum states exhibit a unique objective nature, they are all entangled states. (shrink)

This thesis investigates the nature of psychiatric disorders, and to what extent they can form a basis for classification, explanation, and treatment interventions. These questions are important in the light of the “crisis of validity” in psychiatry, according to which current diagnostic categories do not pick out real disorders. I address the questions by defending an account of psychiatric disorders that can better accommodate social aspects and non-epistemic values than the symptom-based model of the Diagnostic and Statistical Manual of (...) Mental Disorders (DSM) and the brain disease model of the biomedical approach, including the Research Domain Criteria (RDoC). I concentrate on three ways that psychiatric disorders can differ from prototypical natural kinds, such as biological species and chemical elements. First, the concept of psychiatric disorder or mental disorder is partly value-laden and cannot be defined based only on scientific facts. Second, the objects of psychiatric classifications are interactive human kinds because people with disorders respond to their classifications through looping effects. Third, sociocultural factors can shape disorders in complex ways, which is indicated by their cross-cultural variation. I argue that these challenges can be overcome with a pluralistic explanatory account that grants an explicit role to value-sensitive considerations and social scientific research. Based on this, I argue that particular disorders can in principle support inductive inferences. ------------------------------------------------------------------------------------------ My key argument is that although whether a condition is considered pathological is partly a value-laden question, this does not rule out a realist account of particular psychiatric disorders as homeostatic property cluster kinds (HPC). I assert that causal mechanisms responsible for psychiatric kinds can be understood non-metaphysically based on the contrastive-counterfactual and interventionist theories of explanation. An advantage of this account is that it can address the concern that psychiatric explanations require one to relate heterogeneous causal factors on different levels, such as genetic, neurological, psychological, and social. My novel argument is that mechanistic explanations of scientific kinds have applicability domains over which they account for specific aspects of kinds and warrant inductive inferences. That is, identifying the applicability domain of an explanation spells out the conditions under which the explanation is expected to be reliable and when it can break down. This helps to understand how different discipline approaches, including social and cultural ones, can be complementary and make an explanation of a psychiatric kind more reliable. On the other hand, the account also shows how the complex nature of psychiatric kinds can license re-classifications for different epistemic and non-epistemic purposes. Finally, in the light of the social implications of psychiatric classifications, I suggest a value-sensitive or ameliorative approach to engineering the concept of psychiatric disorder. In conclusion, my account shows that research on the social and cultural factors that shape psychiatric disorders, and weighing the non-epistemic values that influence classificatory practices, can and should inform classificatory choices as well as policy and treatment interventions. (shrink)

The Sciences of the Qurʾān contain information about the process of Qurʾān and its structural characteristics, language and stylistic features, as well as statistical data on the content of the Qurʾān. This information, which contributes significantly to the understanding of the Qurʾān, is generally classified within the relevant narratives and the classifications are sometimes associated with verses. In this context, the way in which the Sciences of the Qurʾān explain the verses, which do not act solely on methodical premises, differs (...) from the Qurʾānic exegesis books. In the Sciences of the Qurʾān, the subject of revelation forms are classified within the frame of the narrations, and the 51st verse of the Sūrat al-Shūrā is frequently referred to. In other words, the related classifications are matched with the 51st verse of the Sūrat al-Shūrā. In the exegesis, this verse is handled more comprehensively considering its context and the literal possibilities. There are two remarkable comments about this verse in terms of its reflection in the revelation classifications. However, on the contrary, it is possible to encounter examples where the verse is subject to specific discussions. One of them belongs to Jār Allāh al-Zamakhsharī (d.538/1144) and the other to Nāṣir al-Dīn al-Bayḍāwī (d. 685/1286). When the exegesis of al-Zamakhsharī and al-Bayḍāwī are examined, it is seen that this verse is the subject of ru’yat Allah (seeing Allah) discussion between Muʿtazila and Ahl al-Sunnah and the classifications are made in this context. However, it is interesting to note that the classification of al-Zamakhsharī is more suitable for the perspective of the Sciences of the Qurʾān. In this study, the codes of the determinations made by al-Zamakhsharī and al-Bayḍāwī related to the 51st verse of Sūrat al-Shūrā was read on the commentaries. While al-Zamakhsharī explains this verse as a proof for the argument that God cannot be seen, al-Bayḍāwī develops an example of reactionary interpretation upon Zamakhsharī’s view. The Sciences of the Qurʾān (as a discipline), which opens a separate title to the ways of revelation, uses this verse as a template and takes it away from the discussion. In the study, the subjective dimensions of the discussion and classifications made in the context of this verse were evaluated. As a result, it is concluded that a classification similar to classification of al-Zamakhsharī has been made in the literature of the Sciences of the Qurʾān as it provides more comprehensive framework. Summary: During the period of revelation of the Holy Qurʾān not only the sunnah and actions of the Prophet which explained the Holy Qurʾān, but also various sources of information based on language and consultation, were used in order to understand the Holy Qurʾān. The first people introduced to the revelation used their own language/oratory skills, which were natural them, to understand the Qurʾān and were also able to observe the events and problems that brought about the revelation of the verses. These elements, used by those first people for understanding the Qurʾān, were readily available in their society. Therefore, understanding of the Qurʾān while the Prophet was still alive did not require a codification of those resources or treatment of the matter on a theoretical level. Subsequent generations mostly compensated the lack of those advantages by the use of the Sciences of the Qurʾān books penned individually after 2nd Century (A.H.), and those written systematically under the collective name "the Sciences of the Qurʾān" starting from the 6th century (A.H.). These works covered many subjects such as the beginning of the revelation, the accentuation of the Qurʾān, the physical development process of the Qurʾānic text, information based on observation as well as the tone and content of the Qurʾān and provided information details for Qurʾānic interpretations. Over time, this information was classified in the Sciences of the Qurʾān literature, organized under various relevant titles and enhanced with examples, numerical and qualitative information. One of the main topics of the Sciences of the Qurʾān is the subject of “revelation and its forms”. In the literature of the Sciences of the Qurʾān, the classifications made under this topic are generally associated with the verse 51 of Sūrat al-Shūrā. In this verse, the forms of communication between Allah (Jalla Jalaluhu) and the servant/prophet are categorized. The context of the verse 51 of the Sūrat al-Shūrā in the tafsīr literature is different from the context in the Sciences of the Qurʾān literature. As a matter of fact, while this verse is examined in detail with respect to the context, concept analysis, and the possibilities of i‘rāb (classical Arabic grammar), it is merely referred to in the Sciences of the Qurʾān. This is due to the fact that the determinations and classifications made in the Sciences of the Qurʾān are shaped mostly in the light of the historical context and narrations of the subject.It is also possible to encounter examples of tafsīr where the 51st verse is made the topic of detailed discussions. There are two remarkable comments about this verse in terms of its reflection in the revelation classifications. One of them belongs to Jār Allāh al-Zamakhsharī (d.538/1144) and the other belongs to Nāṣir al-Dīn al-Bayḍāwī (d. 685/1286). The tafsīr s of al-Zamakhsharī and al-Bayḍāwī make it clear that this verse is the subject of ru’yat Allah discussion between the Muʿtazila and Ahl al-Sunnah and the classifications are made accordingly. The fact that i‘rāb examinations of the two authors are similar and both took into account other linguistic possibilities despite their preferences, which also prove that the points of conflict are not literal. Al-Zamakhsharī thinks that this verse determines the way Allah speaks not only with his prophets but also with all people. According to al-Zamakhsharī, the 51st verse refers to the three forms of communication that takes place between God and any of His servants. Allah communicates with His servants; a) through inspiration, inspiration to heart or through dreams, b) by making His words heard through certain channels, c) by sending one of his angels as a messenger. In the verse, the first is expressed as revelation, the second is to speak behind a veil, and the third is to send a messenger. According to al-Zamakhsharī, Allah's inspiration to the mother of Moses, the dream that He showed to Abraham regarding the sacrificing of his son and inspiration of Psalms to David, all relate to the revelation concept mentioned in the first option. Al-Zamakhsharī believes that revelation from behind a veil is an adage. This adage can be compared to a king speaking with one of those at his service behind a veil/curtain, where the person hears the voice of the king but cannot see him. Allah only spoke to Moses and angels in that manner, and sent angels to speak to His other servants/prophets.As a response to al-Zamakhsharī, al-Bayḍāwī interpreted the verse concisely explaining the 'revelation' (وحيا) as a secret word that is quickly understood. Because, in terms of its nature, revelation is not a word made up of sound waves that come one after another to make words. In the verse, this word refers both to the Night Journey (Mi‘rāj) and the talk mentioned in the hadiths regarding the ru’yat Allah, and Allah speaking to Moses without Moses seeing Allah. However, in the verse min verâi ḥicâb/attributed to the word 'revelation 'من وراء حجاب makes it clear that the expression refers to a form of speech in which Allah is heard but not seen. Therefore, the word 'revelation' refers to a mutual talk and according to al-Bayḍāwī, this is proof that ru’yat Allah is possible. The fact that the classifications made in the Sciences of the Qurʾān literature agrees with the classification of al-Zamakhsharī, not al-Bayḍāwī. This result is closely related to the structural features of the Sciences of the Qurʾān in which authors strive to make general explanations that are beyond sectarian preferences and views. Understanding the verse as a conversation between Allah and man, and not between Allah and His prophet, provides a more comprehensive classification in terms of the use of revelations (not only the use of the word revelation) in the Qurʾān. Thus, the address that was made to Abraham in his dream, the revelation of to Moses' mother, and inspiration to our holy Prophet and other people can be interpreted according to this verse. In addition, the ru’yat Allah debate was excluded from the subject in the classifications made in the Sciences of the Qurʾān and implication of the verse was limited to the talks made in a worldly manner. (shrink)

This paper presents the contributions of Alcindo Flores Cabral, professor of Chemistry at the Faculdade de Agronomia Eliseu Maciel, nowadays part of the Universidade Federal de Pelotas, to chemistry teaching. It is a contribution almost unknown to the Brazilian chemical community, although recognized as valuable by several renowned chemists abroad, like W. Hückel, G. Charlot, F. Strong, E. Fessenden and others. Cabral’s innovative helical representation is presented in connection not only with contemporary representations, but also an incursion is made into (...) the first helical systems proposed, those of Hinrichs and of Baumhauer. Some comments are made not only on Cabral’s Classificação Natural dos Elementos, published in 1946, but also about other texts he wrote for an efficient chemistry teaching. (shrink)

How do-or how should-we parse the world into kinds of things? Going back at least to Plato, most philosophers have done so with respect to some notion or other of natural kinds. And many analyses of natural kinds have been essentialistic-that is defining those kinds with respect to universals, or some set of intrinsic properties, or necessary and sufficient conditions. And there's a long-standing dispute between thinkers who regard scientific categories as natural kinds with essential properties fixed (...) by nature-those that "cut nature at its joints"-and thinkers who maintain that our classifications and categories have no essence and instead merely reflect human interests and values. A typical example of the former would be "having a mass of 1.7 × 10-27," and examples of the latter would be the categories of "ADHD," "race," or "child abuse." Khalidi aims for an epistemic, naturalistic, non-essentialist, account of natural kinds, one which comfortably embraces not only the usual candidates favored by essentialists (e.g., elementary particles, chemical elements, biological species), but also categories in the social and behavioral sciences. Drawing on cases from many scientific fields, from fluid mechanics and polymer science to virology and psychiatry, Khalidi argues that "natural kinds are investigative or epistemic kinds, in the sense that they are the categories revealed by our systematic attempts to gain knowledge of nature" (p. 43). Moreover, he claims that natural kinds can be "fuzzy" (i.e. have indefinite boundaries), satisfy epistemic virtues to varying degrees, and be mind-dependent in a way that doesn't detract from their reality or objectivity. Although the book is pitched for a sophisticated and philosophically informed audience (and, needless to say, too complex to be adequately summarized in a brief notice such as this), it's clearly written, nuanced, compellingly argued, and worth the effort for JSE readers curious about the unavoidable metaphysical dimensions of doing science of any kind. (shrink)

The VIA Classification of Character Strengths and Virtue has received substantial attention since its inception as a model of 24 dimensions of positive human functioning, but less so as a potential contributor to a psychological science on the nature of virtue. The current paper presents an overview of how this classification could serve to advance the science of virtue. Specifically, we summarize previous research on the dimensional versus categorical characterization of virtue, and on the identification of cardinal virtues. (...) We give particular attention to the three-dimensional model of cardinal virtues that includes moral, self-regulatory, and intellectual domains. We also discuss the possibility that these three clusters be treated as fundamental elements of a virtue model, meaning that they clearly and directly contribute to both individual and communal flourishing across various cultures. This discussion includes a summary of previous speculations about the evolution of adaptations underlying the human capacity for using behavioral repertoires associated with the three virtues, as well as discussing ways in which they simultaneously enhance community and individual, in the last case focusing particularly on evidence concerning mating potential. We then discuss the relationship between the evolutionary perspective on virtues and Aristotle’s concept of the reciprocity of the virtues. Finally, we provide speculations about the nature of practical wisdom. While accepting the potential value of future revisions to the VIA model, that model even under its current conditions has the potential to generate a number of intriguing and testable hypotheses about the nature of virtue. (shrink)

In this paper I sketch William Whewell’s attempts to impose order on classificatory mineralogy, which was in Whewell’s day (1794e1866) a confused science of uncertain prospects. Whewell argued that progress was impeded by the crude reductionist assumption that all macroproperties of crystals could be straightforwardly explained by reference to the crystals’ chemical constituents. By comparison with biological classification, Whewell proposed methodological reforms that he claimed would lead to a natural classification of minerals, which in turn would support (...) advances in causal understanding of the properties of minerals. Whewell’s comparison to successful biological classification is particularly striking given that classificatory biologists did not share an understanding of the causal structure underlying the natural classification of life (the common descent with modification of all organisms). Whewell’s key proposed methodological reform is consideration of multiple, distinct principles of classification. The most powerful evidence in support of a natural classificatory claim is the consilience of claims arrived at through distinct lines of reasoning, rooted in distinct conceptual approaches to the target objects. Mineralogists must consider not only elemental composition and chemical affinities, but also symmetry and polarity. Geometrical properties are central to what makes an individual mineral the type of mineral that it is. In Whewell’s view, function and organization jointly define life, and so are the keys to understanding what makes an organism the type of organism that it is. I explain the relationship between Whewell’s teleological account of life and his natural theology. I conclude with brief comments about the importance of Whewell’s classificatory theory for the further development of his philosophy of science and in particular his account of consilience. (shrink)

A numerical classification was performed on 69 elements with 54 chemicaland physicochemical properties. The elements fell into clusters in closeaccord with the electron shell s-, p- andd-blocks. The f-block elements were not included forlack of sufficiently complete data. The successive periods ofs- and p-block elements appeared in an ovalconfiguration, with d-block elements lying to one side. Morethan three axes were required to give good representation of thevariation, although the interpretation of the higher axes is (...) difficult.Only 15 properties were scorable for the noble gases, but despite thepaucity of properties reflecting chemical reactivity, analysis of the 69elements on these properties still showed the major features seen fromthe full set. (shrink)

We develop conceptions of arguments and of argument types that will, by serving as the basis for developing a natural classification of arguments, benefit work in artificial intelligence. Focusing only on arguments construed as the semantic entities that are the outcome of processes of reasoning, we outline and clarify our view that an argument is a proposition that represents a fact as both conveying some other fact and as doing so wholly. Further, we outline our view that, with (...) respect to arguments that are propositions, (roughly) two arguments are of the same type if and only if they represent the same relation of conveyance and do so in the same way. We then argue for our conceptions of arguments and argument types, and compare them to alternative positions. We also illustrate the need for, and some of the strengths of, our approach to classifying arguments through an examination of aspects of two prominent and recent attempts to classify arguments using argumentation schemes, namely those of M. Kienpointner and D. Walton. Finally, we clarify how our conception of arguments and of argument types can assist in developing an exhaustive classification of arguments. (shrink)

Classifications of animals and plants have long been represented by hierarchical lists of taxa, but occasional authors have drawn diagrammatic versions of their classifications in an attempt to better depict the "natural relationships" of their organisms. Ornithologists in 19th-century Britain produced and pioneered many types of classificatory diagrams, and these fall into three groups: (a) the quinarian systems of Vigors and Swainson (1820s and 1830s); (b) the "maps" of Strickland and Wallace (1840s and 1850s); and (c) the evolutionary diagrams (...) of the post-Darwin authors (1860 on). The quinarians distinguished between affinity and analogy and used both in their classifications, whereas Strickland rejected the quinarians' belief in numerical regularity and their use of analogy. Wallace's "maps" are easily given an evolutionary interpretation, and his approach was taken up and modified by later evolutionary anatomists. Sharpe returned to Strickland's methods and merely appended a superficial evolutionary interpretation. Contrary to common belief systematics has a rich conceptual history, and many of the conceptual developments in 19th-century systematics were made by ornithologists. (shrink)

In the introduction to his famous book, La Science et l’hypothèse, Poincaré remarks on the necessary role and legitimacy of hypotheses. He establishes a triple classification of hypotheses, dividing them into verifiable, useful, and apparent. However, in chapter 9, entitled ‘Les hypothèses en physique’, he gives a slightly different triadic classification: natural hypotheses, indifferent hypotheses, and real generalizations. The origin of this second classification is a lecture given at the International Congress of Physics, Paris, 1900. What (...) are the similarities and differences between these two classifications? My main purpose is to provide a possible equivalence between the two classifications in order to clarify the role of hypotheses in Poincaré’s epistemology of natural science. The discussion will be based on the two fundamental texts mentioned above and on the contrast between Poincaré’s use of the notion of hypothesis and that of some of his contemporaries. (shrink)

This paper analyses the place of natural history within Bacon's divisions of the sciences in The Advancement of Learning and the later De dignitate et augmentis scientiarum. It is shown that at various points in Bacon's divisions, natural history converges or overlaps with natural philosophy, and that, for Bacon, natural history and natural philosophy are not discrete disciplines. Furthermore, it is argued that Bacon's distinction between operative and speculative natural philosophy and the place of (...) natural history within this distinction, are discontinuous with the later distinction between experimental and speculative philosophy that emerged in the methodology of the Fellows of the early Royal Society. (shrink)

In this paper, we shall discuss some recent contributions to the project [15, 14, 2, 18, 22, 23] of explaining why no satisfactory system of complete invariants has yet been found for the torsion-free abelian groups of finite rank n ≥ 2. Recall that, up to isomorphism, the torsion-free abelian groups of rank n are exactly the additive subgroups of the n-dimensional vector space ℚn which contain n linearly independent elements. Thus the collection of torsion-free abelian groups of rank (...) at most n can be naturally identified with the set S of all nontrivial additive subgroups of ℚn. In 1937, Baer [4] solved the classification problem for the class Sof rank 1 groups as follows.Let ℙ be the set of primes. If G is a torsion-free abelian group and 0 ≠ x ϵ G, then the p-height of x is defined to behx = sup{n ϵ ℕ ∣ There exists y ϵ G such that pny = x} ϵ ℕ ∪{∞}; and the characteristic χ of x is defined to be the function. (shrink)

Metaphysics often has an important role in deciding ethical questions. Specifically, in the realm of bioethics, metaphysical questions such as the nature of persons, diseases, and properties in general can be crucial to determining what is right or wrong. In this article, I tie together various metaphysical themes that recur throughout the rest of the issue: rationality as an element of human nature, ontological classifications, and kinds of action. I will explain that each has ethical implications. Actions that contravene reason (...) will be morally problematic, whereas our classification of illnesses will have important implications for how we ought to respond to ill persons. Metaphysical questions appear, or are at least suggested, in each article, pointing to the need for metaphysics in answering bioethical questions. (shrink)

In natural language processing (NLP), named entity recognition (NER) and semantic classification are essential tasks. NER is a fundamental task, that identify named entities in text such as people, organizations, and locations. In Legal domain, NER is particularly important due to the variety of named entities that appear in legal documents and are important for legal analysis whereas Semantic classification is the process of giving each sentence in a text a semantic label, such as ”fact,””arguments,” or”judgement”. Both (...) NER and Semantic classi- fication are critical component of many NLP applications such as Knowledge base construction and semantic search. Semantic searching of legal documents is a powerful technique that can be used to quickly find the information that you need. By combining NER and semantic classification, one can identify the key elements of a legal document and search for documents that are related to a particular topic or contain a particular type of information. This paper proposes a novel approach to NER and Semantic classification in legal domain using Long short-term memory (LSTM) model. The proposed approach is evaluated on a corpus of legal text and the result of this study suggest that LSTM models are a promising approach for NER and Semantic classification in legal domain and can be used to improve the performance of semantic searching of legal documents. (shrink)

This chapter analyzes how Wittgenstein explicitly addresses the possibility of distinguishing between word types, and not only in the form of presentation of examples. Wittgenstein might be using the terms “kind of word” and “part of speech” in a quite unusual way. The author focuses on just one language, thus no longer being concerned with the possibility of developing diverse new languages without limit. It is not surprising that in the natural languages very many more word types than did (...) “the logicians,” above all Frege, Russell, and the Wittgenstein of the Tractatus, particularly if one does not limit one's interest in language to the expression of a “judgeable content.”. Wittgenstein hints that the classification of words or sentences by their ways of usage on one hand and by their belonging to different types on the other, is a result of two different standpoints on the classification of elements of language. (shrink)

Um bei einer Wertung der Faktoren, die das Wachstum einer Population beeinflussen, zu einer richtigen Einsicht zu gelangen, empfiehlt es sich, nicht den relativen Wert dieser Faktoren in Bezug auf die in Rede stehende Insektenpopulation auszudrücken, sondern ihre absolute Grösse in Faktoreinheiten zum Ausdruck zu bringen — wie: Wärme in Grad Celsius, Luftfeuchtigkeit in Prozenten, Zahl der im Bevölkerungsmilieu vorgefundenen Raubinsekten oder Parasiten. Auf dieser Grundlage liessen sich Faktoren in folgender Weise aufteilen: Faktoren ersten Grades : Allgemeine Faktoren : Unabhängige (...) Faktoren : nicht mechanische Klimaeinflüsse , chemische Faktoren, Güte der Nahrung. Abhängige Faktoren : die internen Faktoren, die bei einer Zunahme der Dichtigkeit einen Rückgang des Zuwachses bewirken, mit Ausnahme des Kannibalismus, ferner die Menge der Nahrung. Selektive Faktoren : Unabhängige Faktoren : unersättliche Faktoren : mechanische Klimaeinflüsse, weitere mechanische Faktoren, Parasiten und Raubfeinde, die nicht mit töten aufhören, wenn sie gesättigt sind, insofern ihre Bevölkerungsdichte nicht durch die des fraglichen Insektes bedingt wird. ersättliche Faktoren: restliche Raubinsekten und Parasiten, insofern ihre Bevölkerungsdichte nicht durch die des fraglichen Insektes bedingt wird. Abhängige Faktoren : Kannibalismus. Wandelbare Faktoren : Raubinsekten und Parasiten, welche diesem Erfordernis entsprechen, pathogene Pilze und Bakterien. Faktoren zweiten Ranges . Faktoren des dritten Ranges .Afin d'obtenir une notion exacte de la valeur des facteurs qui influencent la croissance d'une population, il vaudra mieux ne pas exprimer ces facteurs en leur valeur relative quant à la population d'insectes en question, mais en unités de facteurs: degrés Celsius, pourcentage de l'humidité de l'air, nombre d'ennemis ou de parasites qui sont présents dans le milieu de la population. Sur cette base on pourra répartir les facteurs de la façon suivante: Facteurs du 1er ordre : Facteurs généraux : influences climatiques non mécaniques , facteurs chimiques, qualité de la nourriture. Facteurs dépendants : les facteurs internes qui font de sorte que la densité de la population diminue quand se présente une plus forte densité, en exceptant le cannibalisme, la quantité de nourriture. Facteurs selectifs ; seule une partie des individus est exposée à leur action; les animaux touchés sont mécaniquement endommagés et, dans la règle, tués. Facteurs indépendants : facteurs insatiables : des influences climatiques mécaniques, d'autres facteurs mécaniques, des parasites et des ennemis qui ne s'arrêtent pas de tuer quand ils sont rassasiés, pour autant que l'intensité de la population de l'insecte en question. facteurs rassasiables: autres ennemis et parasites pour autant que l'intensité de leur population ne se modifie pas sous l'influence de la densité de la population de l'insecte en question. Facteurs indépendants : cannibalisme. Facteurs modifiables : ennemis et parasites qui satisfont à cette exigence, champignons pathogènes, bactéries. Facteurs du 2ième ordre . Facteurs du 3iéme ordre. (shrink)

A large part of our exploration of the world consists in categorizing or classifying the objects and processes we encounter, both in scientific and everyday contexts. There are various, perhaps innumerable, ways to sort objects into different kinds or categories, but it is commonly assumed that, among the countless possible types of classifications, one group is privileged. Philosophy refers to such categories as natural kinds. Standard examples of such kinds include fundamental physical particles, chemical elements, and biological species. (...) The term natural does not imply that natural kinds ought to categorize only naturally occurring stuff or objects. Candidates for natural kinds can include man-made substances, such as synthetic elements, that can be created in a laboratory. The naturalness in question is not the naturalness of the entities being classified, but that of the groupings themselves. Groupings that are artificial or arbitrary are not natural; they are invented or imposed on nature. Natural kinds, on the other hand, are not invented, and many assume that scientific investigations should discover them. (shrink)

Writing a book about ‘natural classification’ is not a natural thing to do these days. As the authors of The Nature of Classification point out, classification as a stand-alone topic—separated from discussions of hypothesis testing, experimentation and concept formation—was all the rage in mid-nineteenth century philosophy of science, but interest has steadily dwindled ever since. In most twentieth century philosophy of science, classification was treated either as a pre-scientific endeavor, or as a product of (...) theory-driven science. The general attitude is nicely captured in Carl Hempel’s remarks from his 1966 textbook Philosophy of Natural Science:[I]f a particular way of analyzing and classifying empirical findings is to lead to an explanation of the phenomena concerned, then it must be based on hypotheses about how those phenomena are connected; without such hypotheses, analysis and classification are blind .This was about all Hempel had to say about classifica .. (shrink)

Elements of Mind (EM) has two themes, one major and one minor. The major theme is intentionality, the mind’s direction upon its objects; the other is the mind–body problem. I treat these themes separately: chapters 1, and 3–5 are concerned with intentionality, while chapter 2 is about the mind–body problem. In this summary I will first describe my view of the mind–body problem, and then describe the book’s main theme. Like many philosophers, I see the mind–body problem as containing (...) two sub–problems: the problem of mental causation and the problem of consciousness. I see these problems forming the two horns of a dilemma. Just as the problem of mental causation pushes us towards physicalism, so the problem of consciousness pushes us away from it. Each problem reveals the inadequacy of the solution to the other. Essentially the problem of mental causation is the conflict between (i) the apparent fact that mental states and events have effects in the physical world and (ii) a general principle about the causal nature of the physical world, which is sometimes called the ‘causal closure’ or the ‘causal completeness’ of the physical world. This principle says that all physical effects have physical causes which are enough to bring them about. The problem then is simple: how can a mental cause have a physical effect if that effect also has a physical cause which is enough to bring it about? Barring massive overdetermination of our actions by independent causes, it seems that the best answer is to identify the mental and the physical causes. And this is traditionally how physicalists have argued for their identity theory of mind and body. However, many physicalists reject the identity theory, and therefore they have to solve the mental causation problem in some other way. At present, there is no consensus among physicalists on which of the currently proposed solutions is correct. In chapter 2 of EM I propose an alternative, which I call ‘emergentism’. Inspired by the rejection of the identity theory, Emergentism is the idea that mental properties are genu.. (shrink)

[Introduction]: Curiosity is now widely regarded, with some justification, as a vital ingredient of the inquiring mind and, more particularly, as a crucial virtue for the practitioner of the pure sciences. We have become accustomed to associate curiosity with innocence and, in its more mature manifestations, with the pursuit of truth for its own sake. It was not always so. The sentiments expressed in Sir John Davies's poem, published on the eve of the seventeenth century, paint a somewhat different picture. (...) To seek knowledge with no particular end in mind was to indulge in "fruitlesse curiositie," while the "desire to know" was associated with those catastrophic events that took place at the dawn of history in the Garden of Eden and with the ensuing curse that fell upon succeeding generations. Davies's poem neatly sets out two of the chief impediments to the advancement of learning in seventeenth-century England: the fact that the Genesis narrative attributes the Fall of the human race to the desire for knowledge, and the moral disapprobation associated with the vice of curiosity. In short, the traditional classification of curiosity amongst the vices and its complicity in the commission of the first sin represented a major obstacle to early modern projects to enlarge human learning. This essay will explore the changing fortunes of curiosity, from its construction as an intellectual vice in the patristic era to its subsequent transformation, over the course of the seventeenth century, to a virtue. Particular attention will be paid to the way in which Francis Bacon dealt with prevailing conceptions of curiosity and forbidden knowledge and how he modified an existing view of the moral legitimacy of knowledge of nature in order to provide rhetorical justification for his proposed instauration of learning. This change in the status of knowledge of nature, initiated by Bacon and promoted by his successors, highlights the morally charged character of early modem debates over the status of natural philosophy and the particular virtues required of its practitioners. As we shall see, the rehabilitation of curiosity was a crucial element in the objectification of scientific knowledge and led to a shift of focus away from the moral qualities of investigators and the propriety of particular objects of knowledge to specific disciplines, procedures, and methods. (shrink)

Both lay people and scientists organize the world around them by categorizing particular things as belonging to kinds. Scientists speak and theorize about various kinds of things, like hydrogen, gold, and water; electron and neutron; Canis lupus and Felis catus; igneous rock, sedimentary rock, and metamorphic rock; schizophrenia, psychopathy, and autism; Caucasian, African, and Amerindian. Given this variety of scientific kind categories, one fundamental question for philosophers of science is whether any of these kinds really are natural kinds, and (...) if so, what it is that constitutes their naturalness.nbsp;is to say, when we classify particular things as belonging to the same kind, is it ever the case that they really or naturally belong to the same kind? Do we ever carve the world at its joints, so to speak? Or, are there rather just many different ways in which we, humans, decide to classify particulars into kinds, each possible classification as conventional as any other? In this dissertation, a realist account of natural kinds is defended, according to which some kind classifications are more natural than others. It is argued that the naturalness of scientific kinds can be accounted for by the Causal Unification Theory. According to this view, the naturalness of a kind category lies in the contribution this category makes to our epistemic practices, as a result of accommodating these practices to a causally unified group of properties. Because the properties of natural kind-members are causally unified, they ground multiple causally sustained generalizations. Thus, natural kinds are the metaphysical grounds of systematic scientific research by allowing for multiple inductive generalizations and predictions, and for unified explanations. This view is developed in response to the historically most important theories about natural kinds and several more recent ones. The Causal Unification Theory of natural kinds is then put to work to elucidate the naturalness of two controversial humannbsp;classifications, namely the biological classification of human races and the social psychological classification of homophobes. The current metaphysical race debate is criticized for being too dependent on broad philosophical issues, and it is shown that asking about the naturalness of races, rather than about their existence, allows for a more nuanced debate that is to a larger extent dependent on empirical results. The example of homophobia is discussed in relation to the worry that the normative dimension of many human kinds diminishes the extent to which they can be considered natural kinds. It is argued that we should not be too pessimistic, but that there is indeed reason for concern. To illustrate this, a case is made that the measurement of homophobia is inflated as a result of the normative dimension of this kind. (shrink)

This chapter proceeds in five steps. First, we will describe and justify the structure of the traditional system of species classification. Second, we will discuss three formal principles governing the development of taxonomies in general. It will emerge that, in addition to these formal principles, a division of living beings must meet certain empirical constraints. In the third section, we will show that the traditional division of living beings into species best meets these constraints. Fourth, we will argue that (...) a taxonomic system based on this notion of species provides a more natural alternative to the many arbitrary classifications that are possible. Hence, the traditional classificatory system is also the most natural one. Finally, we will discuss and reject an alternative account that suggests defining species solely with a view to their evolutionary history. We will argue that taxonomic trees do not depict hereditary connections but, rather, something else. (shrink)

In 1934 Jaśkowski and Gentzen independently published their groundbreaking works on Natural Deduction. The aim of this paper is to provide some criteria for division of the diversity of existing systems on some natural subcategories and to show that despite the differences all these systems are descendants of original systems of Jaśkowski and Gentzen. Three criteria are discussed:The kind of items which are building-blocks of the proof.The format of proof.The kind of rules.The first leads to the division of (...) ND into two main classes: F-systems working on formulas and S-systems working on sequents. The second distinguishes between T-systems with tree-proofs and L-systems with linear proofs. Finally, the third leads to several minor divisions in the main categories. (shrink)

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be (...) preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

There have been many attempts to determine what makes a natural kind real, chief among them is the criterion according to which natural kinds must be mind-independent. But it is difficult to specify this criterion: many supposed natural kinds have an element of mind-dependence. I will argue that the mind-independence criterion is nevertheless a good one, if correctly understood: the mind-independence criterion concerns the unification principles for natural kinds. Unification principles determine how natural kinds unify (...) their properties, and only those natural kinds that have a mind-independent unification principle should be considered real. (shrink)

A first-order structure $\mathfrak {A}$ is called monadically stable iff every expansion of $\mathfrak {A}$ by unary predicates is stable. In this paper we give a classification of the class $\mathcal {M}$ of $\omega $ -categorical monadically stable structure in terms of their automorphism groups. We prove in turn that $\mathcal {M}$ is the smallest class of structures which contains the one-element pure set, is closed under isomorphisms, and is closed under taking finite disjoint unions, infinite copies, and finite (...) index first-order reducts. Using our classification we show that every structure in $\mathcal {M}$ is first-order interdefinable with a finitely bounded homogeneous structure. We also prove that every structure in $\mathcal {M}$ has finitely many reducts up to interdefinability, thereby confirming Thomas’ conjecture for the class $\mathcal {M}$. (shrink)

To this day, a hundred and fifty years after Mendeleev's discovery, the overal structure of the periodic system remains unaccounted for in quantum-mechanical terms. Given this dire situation, a handful of scientists in the 1970s embarked on a quest for the symmetries that lie hidden in the periodic table. Their goal was to explain the table's structure in group-theoretical terms. We argue that this symmetry program required an important paradigm shift in the understanding of the nature of chemical elements. (...) The idea, in essence, consisted of treating the chemical elements, not as particles, but as states of a superparticle. We show that the inspiration for this came from elementary particle physics, and in particular from Heisenberg's suggestion to treat the proton and neutron as different states of the nucleon. We provide a careful study of Heisenberg's last paper on the nature of elementary particles, and explain why the Democritean picture of matter no longer applied in modern physics and a Platonic symmetry-based picture was called for instead. We show how Heisenberg's Platonic philosophy came to dominate the field of elementary particle physics, and how it found its culmination point in Gell-Mann's classification of the hadrons in the eightfold way. We argue that it was the success of Heisenberg's approach in elementary particle physics that sparked the group-theoretical approach to the periodic table. We explain how it was applied to the set of chemical elements via a critical examination of the work of the Russian mathematician Abram Ilyich Fet the Turkish-American physicist Asim Orhan Barut, before giving some final reflections. (shrink)

Certain basic concepts of geometrical stability theory are generalized to a class of closure operators containing algebraic closure. A specific case of a generalized closure operator is developed which is relevant to Vaught's conjecture. As an application of the methods, we prove THEOREM A. Let G be a superstable group of U-rank ω such that the generics of G are locally modular and Th(G) has few countable models. Let G - be the group of nongeneric elements of G, G (...) + = G o + G - . Let Π= {q ∈ S( $\emptyset$ ): U(q) $A \subset M$ such that M is almost atomic over A ∪ (G + ∩ M) $\cup \bigcup_{p\in \Pi}$ p(M). (shrink)

Weakly acyclic games form a natural generalization of the class of games that have the finite improvement property. In such games one stipulates that from any initial joint strategy some finite improvement path exists. We classify weakly acyclic games using the concept of a scheduler introduced in Simon and Apt. We also show that finite games that can be solved by the iterated elimination of never best response strategies are weakly acyclic. Finally, we explain how the schedulers allow us (...) to improve the bounds on finding a Nash equilibrium in a weakly acyclic game. (shrink)

The question whether Kuhn's theory of scientific revolutions could be applied to mathematics caused many interesting problems to arise. The aim of this paper is to discuss whether there are different kinds of scientific revolution, and if so, how many. The basic idea of the paper is to discriminate between the formal and the social aspects of the development of science and to compare them. The paper has four parts. In the first introductory part we discuss some of the questions (...) which arose during the debate of the historians of mathematics. In the second part, we introduce the concept of the epistemic framework of a theory. We propose to discriminate three parts of this framework, from which the one called formal frame will be of considerable importance for our approach, as its development is conservative and gradual. In the third part of the paper we define the concept of epistemic rupture as a discontinuity in the formal frame. The conservative and gradual nature of the changes of the formal frame open the possibility to compare different epistemic ruptures. We try to show that there are four different kinds of epistemic rupture, which we call idealisation, re-presentation, objectivisation and re-formulation. In the last part of the paper we derive from the classification of the epistemic ruptures a classification of scientific revolutions. As only the first three kinds of rupture are revolutionary (the re-formulations are rather cumulative), we obtain three kinds of scientific revolution: idealisation, re-presentation, and objectivisation. We discuss the relation of our classification of scientific revolutions to the views of Kuhn, Lakatos, Crowe, and Dauben. (shrink)

Duhem's discussion of physical theories as natural classifications is neither antithetical nor incidental to the main thrust of his philosophy of science. Contrary to what is often supposed, Duhem does not argue that theories are better thought of as economically organizing empirical laws than as providing information concerning the nature of the world. What he is primarily concerned with is the character and justification of the scientific method, not the logical status of theoretical entities. The crucial point to notice (...) is that he took the principle of the autonomy of physics to be of paramount importance and he developed the conception of natural classification in opposition to accounts of physical theories that contravened it. (shrink)

The scientific study of emotion has been characterized by classification schemes that propose to 'carve nature at the joints.' This article examines several of these classifications, drawn from both the categorical and dimensional perspectives. Each classification is given credit for what it contributes to our understanding, but the dream of a single, all purpose taxonomy of emotional phenomena is called into question. Such hopes are often associated with the carving at the joints metaphor, which is here argued to (...) be harmful to scientific realism, and better rejected in favor of a pragmatic approach. Questioning the mere discovery theory of scientific progress, I argue that psychologists discover facts about their domain of study, but have to decide how to classify them. 2012 APA, all rights reserved). (shrink)

A critique of LaPorte's views on chemical kinds, like jade and ruby, is presented. More positively, a new slant is provided on the question of whether elements are natural kinds. This is carried out by appeal to the dual nature of elements, a topic that has been debated in the philosophy of chemistry but not in the natural kinds literature. It is claimed that the abstract notion of elements, as opposed to their being simple substances, (...) is relevant to the Kripke–Putnam approach to natural kinds and to some criticisms that have been raised against it, although I do not support the K–P account. The proposed view avoids the traditional microstructuralist approach to natural kinds. The article also addresses the question of whether natural kinds concern metaphysical or epistemological considerations. Recent attempts by chemists to modify the periodic table are brought to bear on the question of classification and consequently on whether the identification of elements is interest dependent. (shrink)

This paper addresses a central interpretive problem in understanding Pierre Duhem's philosophy of science. The problem arises because there is textual support for both realist and antirealist readings of his work. I argue that his realist and antirealist claims are different. For Duhem, scientific reasoning leads straight to antirealism. But intuition (reasons of the heart) motivates, without justifying, a kind of realism. I develop this idea to suggest a motivational realist interpretation of Duhem's philosophy.

The emphasis on evidence based medicine (EBM) has placed increased focus on finding timely answers to clinical questions in presence of patients. Using a combination of natural language processing for the generation of clinical excerpts and information theoretic distance based clustering, we evaluated multiple approaches for the efficient presentation of context-sensitive EBM excerpts.

Recent interest in the idea that there can be scientific understanding without explanation lends new relevance to Duhem's notion of natural classification. According to Duhem, a classification that is natural teaches us something about nature without being explanatory. However, Duhem's conception of naturalness leaves much to be desired. In this paper, I argue that we can measure the naturalness of classification by using an amended version of the notion of unification as defined by Schurz and (...) Lambert. If this thesis is correct, it both leads to a better conceptual understanding of scientific understanding, and also gives the nascent literature on this topic some much-needed precision. (shrink)

RESUMOEste artigo visa discutir elementos filosóficos presentes na obra de José Barbosa de Sá. Buscamos analisar o sistema de classificação botânica do autor, observando a relação com a construção de analogias e similitudes, avaliando em que medida tais ideias se coadunavam com concepções religiosas. Procuramos ainda discutir o conhecido debate sobre a reprodução vegetal no século XVIII, analisando concepções não acadêmicas. ABSTRACTThis article aims to discuss philosophical elements of the work of José Barbosa de Sá. We seek to analyze (...) the author's system of botanical classification, observing the relation with the construction of analogies and likenesses, evaluating to what extent these ideas were consistent with religious conceptions. We also attempt to examine the well known eighteenth-century known debate about the vegetable reproduction and to analyse non-academic conceptions of it. (shrink)

The twentieth-century Dutch philosopher Herman Dooyeweerd left behind an impressive canon of philosophical works and has continued to influence a scholarly community in Europe and North America, which has extended, critiqued, and applied his thought in many academic fields. Jonathan Chaplin introduces Dooyeweerd for the first time to many English readers by critically expounding Dooyeweerd's social and political thought and by exhibiting its pertinence to contemporary civil society debates. Chaplin begins by contextualizing Dooyeweerd's thought, first in relation to present-day debates (...) and then in relation to the work of the Dutch philosopher Abraham Kuyper. Chaplin outlines the distinctive theory of historical and cultural development that serves as an essential backdrop to Dooyeweerd's substantive social philosophy; examines Dooyeweerd's notion of societal structural principles; and sets forth his complex classification of particular types of social structure and their various interrelationships. Chaplin provides a detailed examination of Dooyeweerd's theory of the state, its definitive nature, and its proper role vis-a-vis other elements of society. Dooyeweerd's contributions, Chaplin concludes, assist us in mapping the ways in which state and civil society should be related to achieve justice and the public good. "This superb study simultaneously introduces and critically engages the work of one of the most important and neglected Christian thinkers of the twentieth century, while showing its connection to the pluralist tradition and bringing it to bear on the contemporary debate about civil society. More than just providing an overview of Dooyeweerd's thought, it seeks to advance his intellectual project and show its contemporary relevance. It is essential reading not only for those interested in the neo-Calvinist tradition, but for anyone interested in Christian social thought, structural pluralism, or the nature and fate of civil society." --_Kenneth L. Grasso, Texas State University _ "The subtlety, scope, and insightfulness of Dooyeweerd's social philosophy were unparalleled among Protestant thinkers in the past century. Yet his contributions are not well known. Jonathan Chaplin promises to remedy this neglect. His lucid and masterful study brings a new and transformative voice to contemporary debates about the future of a democratic society." --_Lambert Zuidervaart, Institute for Christian Studies and University of Toronto_ "Finally, an authoritative book that brings to brilliant light and life Herman Dooyeweerd's Christian philosophy of law, politics, and society. For the past half century, the profound and original teachings of this prolific Dutch sage have been lost on most readers. Jonathan Chaplin has rescued Dooyeweerd from his own obscure prose, poor translations, and cultic mystique to reveal his astonishing and engaging insights into our lives as persons and peoples, rulers and citizens, preachers and parishioners, parents and children. This will be the go-to book on Dooyeweerd for many years to come." --_John Witte, Jr., Emory University_ "Herman Dooyeweerd was both deep and original. Much of his writing is an articulation of rather undeveloped lines of thought in his Dutch predecessor, Abraham Kuyper. In the course of his exposition, Chaplin effectively highlights Dooyeweerd's significance for a theory of civil society and for present-day social theory in general." --_Nicholas Wolterstorff, Yale University and the Institute for Advanced Studies, University of Virginia_. (shrink)