For more than fifty years, taxonomists have proposed numerous alternative definitions of species while they searched for a unique, comprehensive, and persuasive definition. This monograph shows that these efforts have been unnecessary, and indeed have provably been a pursuit of a will o’ the wisp because they have failed to recognize the theoretical impossibility of what they seek to accomplish. A clear and rigorous understanding of the logic underlying species definition leads both to a recognition of the (...) inescapable ambiguity that affects the definition of species, and to a framework-relative approach to species definition that is logically compelling, i.e., cannot not be accepted without inconsistency. An appendix reflects upon the conclusions reached, applying them in an intellectually whimsical taxonomic thought experiment that conjectures the possibility of an emerging new human species. (shrink)

Traditionally, species have been treated as classes. In fact they may be considered individuals. The logical term “individual” has been confused with a biological synonym for “organism.” If species are individuals, then: 1) their names are proper, 2) there cannot be instances of them, 3) they do not have defining properties, 4) their constituent organisms are parts, not members. “ Species " may be defined as the most extensive units in the natural economy such that reproductive competition (...) occurs among their parts. Species are to evolutionary theory as firms are to economic theory: this analogy resolves many issues, such as the problems of “reality” and the ontological status of nomenclatorial types. (shrink)

We argue that the logical outcome of the cladistics revolution in biological systematics, and the move towards rankless phylogenetic classification of nested monophyletic groups as formalized in the PhyloCode, is to eliminate the species rank along with all the others and simply name clades. We propose that the lowest level of formally named clade be the SNaRC, the Smallest Named and Registered Clade. The SNaRC is an epistemic level in the classification, not an ontic one. Naming stops at that (...) level because there is no currently acceptable evidence for clades within it, not because no smaller clades exist. Later, included clades may be named. They would then become the SNaRCs, while the original SNaRC would keep its original name. We argue that all theoretical tasks of biology, in evolution and ecology, as well as practical tasks such as conservation assessment, are better approached using this rankless phylogenetic approach. (shrink)

The species problem is one of the oldest controversies in natural history. Its persistence suggests that it is something more than a problem of fact or definition. Considerable light is shed on the species problem when it is viewed as a problem in the representation of the natural system (sensu Griffiths, 1974, Acta Biotheor. 23: 85–131; de Queiroz, 1998, Philos. Sci. 55: 238–259). Just as maps are representations of the earth, and are subject to (...) what is called cartographic generalization, so diagrams of the natural system (evolutionary trees) are representations of the evolutionary chronicle, and are subject to a temporal version of cartographic generalization which may be termed systematic generalization. Cartographic generalization is based on judgements of geographical importance, and systematic generalization is based on judgements of historical importance, judgements expressed in narrative sentences (sensu Danto, 1985, Narration and knowledge, Columbia Univ. Press, New York). At higher systematic levels these narrative sentences are conventional and retrospective, but near the "species" level they become prospective, that is, dependent upon expectations of the future. The truth of prospective narrative sentences is logically indeterminable in the present, and since all the common species concepts depend upon prospective narration, it is impossible for any of them to be applied with precision. (shrink)

Since the 1970s, there has been a tremendous amount of literature on Ghiselin's proposal that species are individuals. After recalling the origins and stakes of this thesis in contemporary evolutionary theory, I show that it can also be found in the writings of the French naturalist Buffon in the 18th Century. Although Buffon did not have the conception that one species could be derived from another, there is an interesting similarity between the modern argument and that of Buffon (...) regarding the individuality of species. The analogy is strong enough to force us to recognize that genuine evolutionary (or Darwinian) questions might be of secondary importance in the discussion. In consequence, the third section of the paper proposes an alternative schema for the logical structure of the Darwinian concept of species. Darwin distinguished the problem of the designation of a concrete species, and the problem of its signification of species within his theory of descent? The resulting notion of species involves a logical structure based on the fusion of the logical operations of classification and ordering. The difficulty — and interest — is that this interpretation of species does not entail any precise operational definition of species; it can only tell us what the ultimate signification of classification is within the theory of descent with modification through natural selection. (shrink)

The Fifth International Congress of Logic, Methodology and Philosophy of Science was held at the University of Western Ontario, London, Canada, 27 August to 2 September 1975. The Congress was held under the auspices of the International Union of History and Philosophy of Science, Division of Logic, Methodology and Philosophy of Science, and was sponsored by the National Research Council of Canada and the University of Western Ontario. As those associated closely with the work of the Division over (...) the years know well, the work undertaken by its members varies greatly and spans a number of fields not always obviously related. In addition, the volume of work done by first rate scholars and scientists in the various fields of the Division has risen enormously. For these and related reasons it seemed to the editors chosen by the Divisional officers that the usual format of publishing the proceedings of the Congress be abandoned in favour of a somewhat more flexible, and hopefully acceptable, method of pre sentation. Accordingly, the work of the invited participants to the Congress has been divided into four volumes appearing in the University of Western Ontario Series in Philosophy of Science. The volumes are entitled, Logic, Foundations of Mathematics and Computability Theory, Foun dational Problems in the Special Sciences, Basic Problems in Methodol ogy and Linguistics, and Historical and Philosophical Dimensions of Logic, Methodology and Philosophy of Science. (shrink)

This paper argues that the slogans “A Woman's Right to Choose” and “The Personal is the Political” typify different traditions within feminist thinking; one emphasizing rights and equality, the other the unconscious and the personal. The author responds to both traditions by bringing together mind and body, and reason and emotion, via the figure of the copula. The copula expresses an alternative model of identity which indicates that value can be produced only in relation.Let us say that the problem (...) is violence. At its most naive: how can the sexual relation, which is supposedly full of love, be violent?I mean the sexual relation in its resonances and ambiguity—to indicate the relation between the sexes, and the relation between lovers. In no way can the relation be confined to love, either heterosexual or homosexual, since it is often a contest. It cannot be reduced solely to a social relation, because in one of its aspects it addresses the most intimate subjectivity.In a certain feminist lifestyle advocacy, those women who are in same sex relations avoid sexual violence by avoiding men, and those who are in heterosexual relationships strive to find the “right kind”—that is, relationships of respectful and supportive love—rejecting all signs of aggression, from sexist disparagement and emotional cruelty to sexual humiliation and physical assault, as “abuse.”Strangely, this dichotomy does not explain the proximity of passion and aggression, whether in love between men and women or in same-sex relationships between feminist women. As rational counsel, it resists the important sense in which the erotic is, and is even valued as, the excess of the rational. And as an analysis of the oppression of women it defeats itself, for to insist on masculinity as violence itself, and/or on the sexual relation as properly governed by reason, seems to miss the point of both love and feminism.Stranger still, feminisms, which set out to address and redress the oppression of women, have become rivalrous themselves. Are these aggressions a legacy of the intellectual world they must take place in. Have we overlooked an aspect of the relation between sisters? Feminism has not addressed the question of aggression in feminism as anything more than contamination.Perhaps, after all, the thing that feminism has not yet successfully addressed is love. The “battle between the sexes” has not rendered the ambivalence of the heterosexual relation. As a species of theory, feminism has relished the rigor of distinction and has not found it easy to tolerate the proximity of opposites.And yet, in evoking the body, some feminisms approach closer to this difficulty. It remains to take up the relation between the body and the concept more thoroughly, in order to find out whether sexual difference could ever be philosophical. (shrink)

Present-day thought on the notion of species is troubled by a mistaken understanding of the nature of the issue: while the species problem is commonly understood as concerning the epistemology and ontology of one single scientific concept, I argue that in fact there are multiple distinct concepts at stake. An approach to the species problem is presented that interprets the term ‘species’ as the placeholder for four distinct scientific concepts, each having its own role (...) in biological theory, and an explanation is given of the concepts involved. To illustrate how these concepts are commonly conflated, two widely accepted ideas on species are criticized: species individualism and species pluralism. I argue that by failing to distinguish between the four concepts and their particular roles in contemporary biological theory, these ideas stand in the way of a final resolution of the species problem. (shrink)

ASSERTIONS ARE A SYMBOLIC FORM that exists only within species--specifically human language. Language, of course, allows for many other conventions of symbolic expression: greetings, exclamations, commands, exhortations, imprecations, interrogatives, and so forth. But assertions are unique in possessing, of themselves, a truth-value--that is to say, in being adjudicable as true or false. All other varieties of discourse are adjudicable as true or false by reason of assertions they presuppose, contain, or imply. But the assertion as such is what is (...) directly so adjudicable. (shrink)

De-extinction technology aims to bring extinct species back into existence, often with the goal of releasing created organisms into natural environments. In this paper, I argue that there are aesthetic reasons to avoid engaging in de-extinction and release projects, even if they pass moral permissibility criteria. The strength of these reasons depends on conclusions regarding species authenticity - a problem that arises at the intersection of de-extinction technology and the 'species problem' in the philosophy of (...) biology. Since species authenticity affects the perceived naturalness of 'natural' environments, and thus the aesthetic judgments thereof, I contend that there will be negative aesthetic consequences of de-extinction efforts that ought to be further explored before such projects move forward. (shrink)

The species problem is the longstanding puzzle regarding the nature of species. This paper aims to describe how biologists experience little communication breakdown when they have different conceptions of species. For this purpose, I analyze two debates on species and speciation between Guy Bush and Jerry Coyne & H. Allen Orr. Although they have radically different ideas on species, they experience little communication difficulty. I will argue that this is because they implicitly agreed on (...) the referent of the group of organisms being addressed and possible causal factors of the speciation process. This analysis confirms a leading account in the general philosophy of science on the way in which scientists avoid the incommensurability threat. (shrink)

The Logic of Causation: Definition, Induction and Deduction of Deterministic Causality is a treatise of formal logic and of aetiology. It is an original and wide-ranging investigation of the definition of causation (deterministic causality) in all its forms, and of the deduction and induction of such forms. The work was carried out in three phases over a dozen years (1998-2010), each phase introducing more sophisticated methods than the previous to solve outstanding problems. This study was intended as part (...) of a larger work on causal logic, which additionally treats volition and allied cause-effect relations (2004). The Logic of Causation deals with the main technicalities relating to reasoning about causation. Once all the deductive characteristics of causation in all its forms have been treated, and we have gained an understanding as to how it is induced, we are able to discuss more intelligently its epistemological and ontological status. In this context, past theories of causation are reviewed and evaluated (although some of the issues involved here can only be fully dealt with in a larger perspective, taking volition and other aspects of causality into consideration, as done in Volition and Allied Causal Concepts). Phase I: Macroanalysis. Starting with the paradigm of causation, its most obvious and strongest form, we can by abstraction of its defining components distinguish four genera of causation, or generic determinations, namely: complete, partial, necessary and contingent causation. When these genera and their negations are combined together in every which way, and tested for consistency, it is found that only four species of causation, or specific determinations, remain conceivable. The concept of causation thus gives rise to a number of positive and negative propositional forms, which can be studied in detail with relative ease because they are compounds of conjunctive and conditional propositions whose properties are already well known to logicians. The logical relations (oppositions) between the various determinations (and their negations) are investigated, as well as their respective implications (eductions). Thereafter, their interactions (in syllogistic reasoning) are treated in the most rigorous manner. The main question we try to answer here is: is (or when is) the cause of a cause of something itself a cause of that thing, and if so to what degree? The figures and moods of positive causative syllogism are listed exhaustively; and the resulting arguments validated or invalidated, as the case may be. In this context, a general and sure method of evaluation called ‘matricial analysis’ (macroanalysis) is introduced. Because this (initial) method is cumbersome, it is used as little as possible – the remaining cases being evaluated by means of reduction. Phase II: Microanalysis. Seeing various difficulties encountered in the first phase, and the fact that some issues were left unresolved in it, a more precise method is developed in the second phase, capable of systematically answering most outstanding questions. This improved matricial analysis (microanalysis) is based on tabular prediction of all logically conceivable combinations and permutations of conjunctions between two or more items and their negations (grand matrices). Each such possible combination is called a ‘modus’ and is assigned a permanent number within the framework concerned (for 2, 3, or more items). This allows us to identify each distinct (causative or other, positive or negative) propositional form with a number of alternative moduses. This technique greatly facilitates all work with causative and related forms, allowing us to systematically consider their eductions, oppositions, and syllogistic combinations. In fact, it constitutes a most radical approach not only to causative propositions and their derivatives, but perhaps more importantly to their constituent conditional propositions. Moreover, it is not limited to logical conditioning and causation, but is equally applicable to other modes of modality, including extensional, natural, temporal and spatial conditioning and causation. From the results obtained, we are able to settle with formal certainty most of the historically controversial issues relating to causation. Phase III: Software Assisted Analysis. The approach in the second phase was very ‘manual’ and time consuming; the third phase is intended to ‘mechanize’ much of the work involved by means of spreadsheets (to begin with). This increases reliability of calculations (though no errors were found, in fact) – but also allows for a wider scope. Indeed, we are now able to produce a larger, 4-item grand matrix, and on its basis find the moduses of causative and other forms needed to investigate 4-item syllogism. As well, now each modus can be interpreted with greater precision and causation can be more precisely defined and treated. In this latest phase, the research is brought to a successful finish! Its main ambition, to obtain a complete and reliable listing of all 3-item and 4-item causative syllogisms, being truly fulfilled. This was made technically feasible, in spite of limitations in computer software and hardware, by cutting up problems into smaller pieces. For every mood of the syllogism, it was thus possible to scan for conclusions ‘mechanically’ (using spreadsheets), testing all forms of causative and preventive conclusions. Until now, this job could only be done ‘manually’, and therefore not exhaustively and with certainty. It took over 72’000 pages of spreadsheets to generate the sought for conclusions. This is a historic breakthrough for causal logic and logic in general. Of course, not all conceivable issues are resolved. There is still some work that needs doing, notably with regard to 5-item causative syllogism. But what has been achieved solves the core problem. The method for the resolution of all outstanding issues has definitely now been found and proven. The only obstacle to solving most of them is the amount of labor needed to produce the remaining (less important) tables. As for 5-item syllogism, bigger computer resources are also needed. (shrink)

This paper tries to clarify the logical structure of the relationship between labor values and prices from an axiomatic perspective. The famous “transformation problem” is interpreted as an impossibility result for a specific interpretation of value theory based on specific assumptions and definitions. A comprehensive review of recent literature is provided, which shows that there are various theoretically relevant and logically consistent alternative interpretations based on different assumptions and definitions.

Stamos squarely confronts the problem of determining what a biological species is, whether species are real, and the nature of their reality. He critically considers the evolution of the major contemporary views of species and also offers his own solution to the species problem.

The concept of species is one of the core concepts in biology and one of the cornerstones of evolutionary biology, yet it is rife with conceptual problems. Philosophers of biology have been discussing the concept of species for decades, and in doing so they sometimes appeal to the views of biologists. However, their statements as to what biologists think are seldom supported by empirical data. In order to investigate what biologists actually think about the key issues related to (...) the problem of species, we have conducted a survey on the sample of 193 biologists from the population of biologists from over 150 biology departments at universities in the US and the EU. This article presents and discusses the results of the survey. Some results confirm and others falsify the reiterated statements of philosophers of biology as to what biologists think, but all results we obtained should be informative and relevant for future discussions of the problem of species. (shrink)

Stamos squarely confronts the problem of determining what a biological species is, whether species are real, and the nature of their reality. He critically considers the evolution of the major contemporary views of species and also offers his own solution to the species problem.

This paper offers a novel solution to the long-standing puzzle of why the Canon of Pure Reason maintains, in contradiction to Kant’s position elsewhere in the first Critique, both that practical freedom can be proved through experience, and that the question of our transcendental freedom is properly bracketed as irrelevant in practical matters. The Canon is an a priori investigation of our most fundamental practical capacity. It is argued that Kant intends its starting point to be explanatorily independent of transcendental (...) logic and the ontic more generally, an independence that would be compromised if transcendental freedom were included in that starting point, even in a mode of supposition. In a different sense, however, practical reason precisely is dependent on the ontic: it can be realized only in beings. This species of dependence is used to explain the puzzling claim that practical freedom can be experienced. (shrink)

We propose a solution to the problem of logical omniscience in what we take to be its fundamental version: as concerning arbitrary agents and the knowledge attitude per se. Our logic of knowledge is a spin-off from a general theory of thick content, whereby the content of a sentence has two components: an intension, taking care of truth conditions; and a topic, taking care of subject matter. We present a list of plausible logical validities and invalidities for the (...) logic of knowledge per se for arbitrary agents, and isolate three explanatory factors for them: the topic-sensitivity of content; the fragmentation of knowledge states; the defeasibility of knowledge acquisition. We then present a novel dynamic epistemic logic that yields precisely the desired validities and invalidities, for which we provide expressivity and completeness results. We contrast this with related systems and address possible objections. (shrink)

The so-called ‘‘species problem’’ has plagued evolution- ary biology since before Darwin’s publication of the aptly titled Origin of Species. Many biologists think the problem is just a matter of semantics; others complain that it will not be solved until we have more empirical data. Yet, we don’t seem to be able to escape discussing it and teaching seminars about it. In this paper, I briefly examine the main themes of the biological and philosophical liter- atures (...) on the species problem, focusing on identifying common threads as well as relevant differences. I then argue two fundamental points. First, the species problem is not primarily an empirical one, but it is rather fraught with philosophical questions that require—but cannot be settled by—empirical evidence. Second, the (dis-)solution lies in explicitly adopting Wittgenstein’s idea of ‘‘family resemblance’’ or cluster concepts, and to consider spe- cies as an example of such concepts. This solution has several attractive features, including bringing together apparently diverging themes of discussion among bio- logists and philosophers. The current proposal is con- ceptually independent (though not incompatible) with the pluralist approach to the species problem advocated by Mishler, Donoghue, Kitcher and Dupre ́, which implies that distinct aspects of the species question need to be emphasized depending on the goals of the researcher. From the biological literature, the concept of species that most closely matches the philosophical discussion pre- sented here is Templeton’s cohesion idea. (shrink)

In this paper I will argue that Hegel’s account of the category of life in the Science of Logic provides ontological grounds for the recognition of living species along with their various ecosystems as the proper objects of ethical regard for environmental ethics. I will begin by enumerating some of the salient problems that have arisen in the more well known theoretical attempts to articulate human duties to nonhuman beings. Then after a brief discussion of Hegel’s methodology and (...) the justification for turning to his ontological account, I will explicate Hegel’s ontology of life with a view toward these problems and issues, presenting my argument as to why that account is relevant to environmental ethics and deriving from it a normative framework that implies a duty to preserve species, habitats, and biological diversity. Finally, I will suggest how the Hegelian account presented here might circumvent the shortcomings of the previously discussed theories while accommodating some of their concerns and provide solutions for some of the problems to which they call attention. (shrink)

In he Problems of Philosophy and other works of the same period, Russell claims that every proposition must contain at least one universal. Even fully general propositions of logic are claimed to contain “abstract logical universals”, and our knowledge of logical truths claimed to be a species of a priori knowledge of universals. However, these views are in considerable tension with Russell’s own philosophy of logic and mathematics as presented in Principia Mathematica. Universals generally are qualities and (...) relations, but if, for example, PM’s disjunction (∨) is a relation, what is it a relation between? There is no obvious answer to this given Russell’s other philosophical commitments at this time, although hints are left in some of the pre-PM manuscripts. In this paper, I explore this tension in Russell's philosophy and relate it to developments both before and after Problems. (shrink)

There is long-standing disagreement among systematists about how to divide biodiversity into species. Over twenty different species concepts are used to group organisms, according to criteria as diverse as morphological or molecular similarity, interbreeding and genealogical relationships. This, combined with the implications of evolutionary biology, raises the worry that either there is no single kind of species, or that species are not real. This book surveys the history of thinking about species from Aristotle to modern (...) systematics in order to understand the origin of the problem, and advocates a solution based on the idea of the division of conceptual labor, whereby species concepts function in different ways - theoretically and operationally. It also considers related topics such as individuality and the metaphysics of evolution, and how scientific terms get their meaning. This important addition to the current debate will be essential for philosophers and historians of science, and for biologists. (shrink)

Roughly, the problem of the Trinity is the problem of how God can be one and yet be the Father, the Son, and the Holy Spirit, which are three, not one. That one thing is identical with three distinct things seems to violate traditional laws of identity. I propose a solution to this problem according to which it is just an ordinary claim of one-many identity. For example, one pair of shoes is identical with two shoes; and (...) my one body is identical with its six limbs of arms, legs, head, and torso. The pair of shoes is not identical with each one of the two shoes, nor is my body identical with each one of its six limbs, but rather identical with all of them taken together, or collectively. I argue that the problem of the Trinity should be understood accordingly: God is identical with the Father, the Son, and the Holy Spirit collectively, but not with each one of them distributively. According to the way I develop this proposal, no traditional laws of identity are violated, but merely generalized in an intuitive way. I argue that this is compatible with Christian Orthodoxy as given by the Athanasian Creed. I end by responding to some anticipated objections. (shrink)

In this article, I argue that species are mutable in Hegel’s philosophy of biology. While scholars have argued for the compatibility of Hegel’s philosophy and Darwin’s theory of evolution, none have dealt with the ontological status of species in their respective accounts. In order to make the case that for Hegel species are mutable, I first deal with a textual problem that in the 1827 edition of the Encyclopedia, the species concept appears after the sexual (...) relationship, whereas in the 1830 edition it appears prior. I argue that these different sequences entail different models for the species concept. By examining the conceptual development leading up to the account of species, on the one hand, and contemporary biological accounts of the status of species on the other, I argue that the 1827 model is more consistent both with Hegel’s method and with the species concept of contemporary biology. (shrink)

Politics and Modernity provides a critical review of the key interface of contemporary political theory and social theory about the questions of modernity and postmodernity. Review essays offer a broad-ranging assessment of the issues at stake in current debates. Among the works reviewed are those of William Connolly, Anthony Giddens, J[um]urgen Habermas, Alasdair MacIntyre, Richard Rorty, Charles Taylor and Roy Bhaskar. As well as reviewing the contemporary literature, the contributors assess the historical roots of current problems in the works of (...) Nietzsche and Max Weber. (shrink)

"The Philosophy of the Future" which has cost the author 'more than half a century of toil', is a stout defense of the principle of Causation both against the philosophical scientists who, following Hume, would reduce cause to customary sequence among our sense-impressions, and against the subordination by many writers on logic of the notion of cause to that of reason or ground. To cancel causality is to efface all distinction between truth and falsehood. Scientia est cognoscere causas. "The (...) sole essential function of all thinking is to discriminate between cause and effect." "There is no known form of thought which is not ultimately reducible into an assertion of cause and effect." From the vantage ground of this theorem, with its corollary that "a cause cannot be known except through its effects, or an effect apart from its cause", Mr. Hebberd trains his guns upon the systems of Hume, Kant, Hegel, Mill, and other logical writers. He reviews successively Space, Time, the Concept, Judgment, and finally Induction, defined as "the discovery of causal processes by means of physical and mental experiment", in the attempt to show that all categories are but species and derivative forms under the supreme and all-embracing category of causality. The logical discussion is followed by chapters on God, Freedom and the Soul, in which the metaphysical application of his principles is made. The causal concept is utilized to strengthen the ontological argument. "The conception of a sufficient cause, fully understood, is identical with the theistic conception of God." This conception of a sufficient cause involves unity, infinitude, freedom and love (if an infinite being acts at all, or causes any changes, it must be for the sake of others). The fact again that the causal nexus is "a reality imperceptible to the senses" discredits materialism and positivism, and is used in demonstration of the existence and immortality of the soul. Mr. Hebberd attempts no exact definition of cause, but this, as he says in the appendix, is because he regards it as incapable of ordinary definition, "there being no wider genus under which it can be ranged as a species" (p. 214). He omits also any discussion of the origin of the causal concept. While frequently inveighing against innate ideas and Kantian apriorities, and rejecting impartially "the Scottish philosophy of 'common sense', with its short and easy method of 'intuitions', the French and English empiricism, the Teutonic illusionism" (p. 95) he yet declares: "Man does come into the world equipped, not with intuitions, but with the means of attaining to an assured knowledge of the world as the workmanship of an infinite and benevolent Being. For he comes endowed with the prerogative of thought; but to think is to affirm causality" (p. 157). What is this but intuitionism? Mr. Hebberd's work, it will be seen, is a discussion at once ambitious and concise of the deepest problems of logic and metaphysics. His book, in our judgment, is well worth the attention of the philosophical reader, who cannot but enjoy its incisive style, its trenchant criticisms, its wide outlook upon philosophic thought, and its original insights into its problems. -The Princeton Theological Review, Vol. 12 [1914]. (shrink)

This chapter focuses on how Aquinas’ solution of the problem of the persistence of eucharistic species and other scholastics’ reactions to it opened up certain conceptual possibilities in the Scholastic Aristotelian tradition that would not have been there without it, and which, therefore, were pointing the way toward later conceptual developments in the post-medieval and early modern philosophical traditions in logic, and metaphysics.

In this translation of his 1936 essay, Tosaka Jun critically examines Tanabe Hajime’s “logic of species,” paying particular attention to its basis, i.e. the logic of “absolute mediation” that Tanabe had devised earlier. In 1936, the logic of species had only been developed within a few texts, including “The Logic of Social Being” (1934–5) and “The Logic of Species and the World Schema” (1935). Interestingly enough, Tosaka agrees to a certain extent with (...) Tanabe’s criticism of the “logic of nothingness” lying at the bottom of Nishida Kitaro’s philosophy, according to which criticism the place of nothingness represents a mystical immediacy. Tosaka, however, also criticizes Tanabe’s own position, claiming that his idea of absolute mediation, in which all immediacies are mediated, leads to a logical absolutism neglecting the materiality of nature. Tosaka claims that the temporal relationship between the mediator and the mediated should be addressed in terms of a “chronology” in which nature exists prior to the subject. Not only Tosaka’s immanent criticism of Tanabe contributed to the development of the “Kyoto School” (an expression Tosaka invented himself in 1932), but the question of “chronology,” with regard to mediation, has a modern theoretical significance as a point of contention in the contemporary debate between realism and constructivism. (shrink)

Book review of Richard A. Richards' The Species Problem: A Philosophical Analysis.

The new millennium has opened with a perfectly splendid decade of scholarship relating to the ‘Species Problem’. So, at least we now have a clear idea of what this is, but still no clear solution that will suit both biologists and philosophers. Richards has recently attempted to capture this story and to fill the void with two projects in one book. The first project is a descriptive and analytical history of the problem, which provides links to other (...) recent works and thereby allows one to fully reconstruct the literature. The second is prescriptive and presents Richards’s solution via a ‘division of labour in a conceptual framework’ followed by recapitulation and conclusions. It is my assessment as presented here that the first project will appeal more to biologists and the second one to philosophers. There is much of value in Richards approach including an excellent evaluation of the essentialism story in the descriptive project and clear exposition of several key issues such as the ‘species-as-individuals’ versus ‘species-as-categories’ debate which are covered in the second project. Interesting and informative as these arguments undoubtedly are, something still seems to be missing here. In this essay I suggest that this perception arises from Richards’ failure to embrace ideas about the importance of relativity and contingency in species definitions and further that his new conceptual framework lacks one hierarchical level to link overarching lineage concepts of species as evolutionary units with practical definitions for their recognition. In my view, the missing link is reproductive isolation and I conclude my review by presenting a prescriptive project for biologists to balance the one that Richards has delivered to philosophers. (shrink)

This paper examines the species problem in microbiology and its implications for the species problem more generally. Given the different meanings of ‘species’ in microbiology, the use of ‘species’ in biology is more multifarious and problematic than commonly recognized. So much so, that recent work in microbial systematics casts doubt on the existence of a prokaryote species category in nature. It also casts doubt on the existence of a general species category for (...) all of life (one that includes both prokaryotes and eukaryotes). Prokaryote biology also undermines recent attempts to save the species category, such as the suggestion that species are metapopulation lineages and the idea that ‘species’ is a family resemblance concept. (shrink)

Biologists and philosophers that debate the existence of the species category fall into two camps. Some believe that the species category does not exist and the term 'species' should be eliminated from biology. Others believe that with new biological insights or the application of philosophical ideas, we can be confident that the species category exists. This paper offers a different approach to the species problem. We should be skeptical of the species category, but (...) not skeptical of the existence of those taxa biologists call 'species.' And despite skepticism over the species category, there are pragmatic reasons for keeping the word 'species.' This approach to the species problem is not new. Darwin employed a similar strategy to the species problem 150 years ago. (shrink)

“For there shall be days when you will say: Blessed is the womb which has not conceived, and those breasts which have not given suck.”The Apocryphal Gospel of Thomas (1)“ Oh man! why is the world becoming so narrow for you? You want to possess it alone; but if you had possessed it, it would not have been spacious enough for you:Ah! this is the pride of the devil who has fallen from heaven into hell.”.

Those who speak of the philosophy of science do not all have the same sort of study in mind. For some it is speculation about the overall nature of the world. Others take it to be basic theory of knowledge and perception. And for still others, it is a branch of philosophical analysis focused speci is meant to be a study falling under fically on science. The present book this last category. Generally, such a study has two aspects: one, methodological, (...) dealing with the logical structure of science, the other, substantive, dealing with scientific concepts. Our concern here is primarily methodological; and, where discussion veers at times towards substantive matters, this will be largely for the purpose of illustrating underlying methodological points. It should also be added that our considerations will be of a general sort, intended to apply to all of science with no special concern for any particular divisions. Except in an incidental manner, therefore, we shall give no primary attention to special problems in the methodology of the social sciences or in the philosophy of physics or of biology. And if we draw the larger portion of our examples from the physical rather than from the behavioral sciences, this is done merely for simplicity, succinctness, and similar conveniences of exposition rather than out of specialized concern for any particular area. (shrink)

Despite many years of discussion, the species problem has still not been adequately resolved. Why is this the case? Here I discuss two recent suggested answers to this question that place the blame on the species problem's empirical aspects or on its philosophical aspects. In contrast, I argue that neither of these two faces of the species problem constitute the principal cause of the species problem's persistence. Rather, they are merely symptoms of (...) the real cause: the species problem has not yet gone away because of a failure to recognize that not one but a number of distinct concepts are at the heart of the problem. To illustrate this point, a recently proposed solution to the problem is examined: the suggestion to understand the concept of species as a family resemblance concept. BioEssays 26:300–305, 2004. © 2004 Wiley Periodicals, Inc. (shrink)

Aquinas’s eudaimonism is normally interpreted as twofold in that it divides into the imperfect natural happiness of Aristotle and the perfect supernatural happiness of Augustine. I argue that Aquinas is logically committed to a third type of happiness that, in light of the standard view, renders his eudaimonism threefold. The paper begins with an overview of the standard twofold model of Aquinas’s eudaimonism; it then turns to the model’s logical problem whose solution requires the postulation of a third type (...) of happiness. In the second part of the paper, two clarificatory issues are addressed and several objections are considered. In closing, I explain why Aquinas’s commitment to a third type of happiness offers the Christian wayfarer grounds for a new optimism. (shrink)

The correct explanation of why species, in evolutionary theory, are individuals and not classes is the cladistic species concept. The cladistic species concept defines species as the group of organisms between two speciation events, or between one speciation event and one extinction event, or (for living species) that are descended from a speciation event. It is a theoretical concept, and therefore has the virtue of distinguishing clearly the theoretical nature of species from the practical (...) criteria by which species may be recognized at any one time. Ecological or biological (reproductive) criteria may help in the practical recognition of species. Ecological and biological species concepts are also needed to explain why cladistic species exist as distinct lineages, and to explain what exactly takes place during a speciation event. The ecological and biological species concepts work only as sub-theories of the cladistic species concept and if taken by themselves independently of cladism they are liable to blunder. The biological species concept neither provides a better explanation of species indivudualism than the ecological species concept, nor, taken by itself, can the biological species concept even be reconciled with species individualism. Taking the individuality of species seriously requires subordinating the biological, to the cladistic, species concept. (shrink)

The mind-body problem is—despite appearances—still the inevitable basic issue of unending discussions in recent philosophy. Various types of epistemologies and metaphysics, European and American, have offered their widely divergent “solutions” of the dreaded Cartesian tangle. Is there any hope of reaching a universally acceptable view?

This chapter commences with an account on the Zillo Beasts. The reawakening of extinct species, or "de‐extinction," has gained massive popular appeal. The chapter explains some facts before delving into the philosophical debate over de‐extinction. Philosophers sometimes use far‐fetched examples to answer the questions that are left after we agree on all the facts. These “thought experiments” are meant to show us what we really believe. What makes a duck a duck, a mammoth a mammoth, or a Zillo Beast (...) a Zillo Beast? This is called the species problem, and it is one of the oldest in the philosophy of biology. Essentialism is the view that permits us to say that the Zillo Beast's clone would be a member of the Zillo Beast species. The New Essentialists argue that essentialism can be compatible with natural selection if one looks beyond organisms' traits for species essences. (shrink)