Free logic is an important field of philosophical logic that first appeared in the 1950s. J. Karel Lambert was one of its founders and coined the term itself. The essays in this collection (written over a period of 40 years) explore the philosophical foundations of free logic and its application to areas as diverse as the philosophy of religion and computer science. Amongst the applications on offer are those to the analysis of existence statements, to definite descriptions and to (...) partial functions. The volume contains a proof that free logics of any kind are non-extensional and then uses that proof to show that Quine's theory of predication and referential transparency must fail. The purpose of this collection is to bring an important body of work to the attention of a new generation of professional philosophers, computer scientists, and mathematicians. (shrink)
Free logic, an alternative to traditional logic, has been seen as a useful avenue of approach to a number of philosophical issues of contemporary interest. In this collection, Karel Lambert, one of the pioneers in, and the most prominent exponent of, free logic, brings together a variety of published essays bearing on the application of free logic to philosophical topics ranging from set theory and logic to metaphysics and the philosophy of religion. The work of such distinguished philosophers as (...) Bas van Fraassen, Dana Scott, Tyler Burge, and Jaakko Hintikka is represented. Lambert provides an introductory essay placing free logic in the logical tradition beginning with Aristotle, developing it as the natural culmination of a trend begun in the Port Royal logic of the 1600s, and continuing through current predicate logic--the trend to rid logic of existence assumptions. His Introduction also provides a useful systematic overview of free logic, including both a standard syntax and some semantical options. (shrink)
The essay outlines the character of free logic, and motivation for its construction and development. It details some technical achievements of high philosophical interest, but urges that the role of existence assumptions in logic is still not fully understood, that unresolved old problems, both technical and philosophical, abound, and presents some new problems of considerable philosophical import in free logic.
This paper criticizes an empirical reading of On Perpetual Peace. It is also equally critical of the approach taken by philosophically minded scholars to give preference to Kant's philosophical outlook. Instead, it focuses on the peculiar oscillation between the philosophical and political aspects of the essay. Contrary to current concerns to update the conceptual framework of On Perpetual Peace—to rescue it from becoming obsolete—its salient irony, which mediates between both aspects, is singled out as a clue to an interpretation which (...) seeks to account for both of them. Thus, the essay can still be a source of inspiration for peace research. (shrink)
This paper deals with the Meinong-Russell controversy on nonsubsistent objects. The first part notes the similarity of certain contemporary semantical developments to Meinonj;'s theory of nonsubsistent objects. Then it lays out the major features of Meinong's famous theory, considers Russell's objections to same and Meinong's counter-objections to Russell, and argues that Russell's well-known argument fails. However, it is possible to augment Russell's argument against Meinong with sound Russellian principles in such a way that it presents at least a strong inclining (...) reason against Meinong's theory of impossible objects. (shrink)
In his 1923 play R.U.R.: Rossum s Universal Robots, Karel Capek coined robot as a derivative of the Czech robota (forced labor). Limited to work too tedious or dangerous for humans, today s robots weld parts on assembly lines, inspect nuclear plants, and explore other planets. Generally, robots are still far from achieving their fictional counterparts intelligence and flexibility. Humanoid robotics labs worldwide are working on creating robots that are one step closer to science fiction s androids. Building a (...) humanlike robot is a formidable engineering task requiring a combination of mechanical, electrical, and software engineering; computer architecture; and realtime control. In 1993, we began a project aimed at constructing a humanoid robot for use in.. (shrink)
Henry Leonard and Karel Lambert first introduced so-called presupposition-free (or just simply: free) logics in the 1950’s in order to provide a logical framework allowing for non-denoting singular terms (be they descriptions or constants) such as “the largest prime” or “Pegasus” (see Leonard [1956] and Lambert [1960]). Of course, ever since Russell’s paradigmatic treatment of definite descriptions (Russell [1905]), philosophers have had a way to deal with such terms. A sentence such as “the..
The basic theory of scientific understanding presented in Sections 1–2 exploits three main ideas.First, that to understand a phenomenonP (for a given agent) is to be able to fitP into the cognitive background corpusC (of the agent).Second, that to fitP intoC is to connectP with parts ofC (via arguments in a very broad sense) such that the unification ofC increases.Third, that the cognitive changes involved in unification can be treated as sequences of shifts of phenomena inC. How the theory fits (...) typical examples of understanding and how it excludes spurious unifications is explained in detail. Section 3 gives a formal description of the structure of cognitive corpuses which contain descriptive as well as inferential components. The theory of unification is then refined in the light of so called puzzling phenomena, to enable important distinctions, such as that between consonant and dissonant understanding. In Section 4, the refined theory is applied to several examples, among them a case study of the development of the atomic model. The final part contains a classification of kinds of understanding and a discussion of the relation between understanding and explanation. (shrink)
Abstract Western philosophical and psychological thinking lacks an accepted theory of human personality; it has produced conflicting and inadequate notions, such as the religious one of a soul, the vague concept of the ?mind? and biological theories basing their understanding of man on the functions of the nervous system, particularly the brain, or dealing with his mental dimension only in terms of behavioural patterns. This paper explores the notions of personality in Indian systems and finds that virtually all of them (...) understand it, despite differing terminology, as a fluid complex of functions or living forces characterised by intrinsic intelligence and coordinated by a dynamic structural principle, operating on three levels of reality: phenomenal material, phenomenal immaterial and noumenal or absolute. One can say that the Indian tradition fully appreciated the complexity of the problem and produced theories of personality which are more comprehensive than western ones and merit study as well as attention from the point of view of contemporary creative philosophical thinking. [1]. (shrink)
The aim of this paper is to compare the contents of the Lotus Stra and the style of presentation of its message with the thrust of the Buddha's teachings as they are preserved in the early Buddhist sources, particularly the Sutta Piaka of the Pāli Canon, and also in the Pāli commentarial literature. In the process it attempts to identify in the early sources the precedents of some of the bold statements in the Lotus Stra which appear as complete innovations, (...) but may be elaborations of elements contained in Pāli sources in germinal form. Despite the difference in style, language and mythological imagery, the conclusion is that both the Sutta Piaka and the Lotus Stra express in their respective manners the true spirit of the Buddhist message. Attention is drawn also to the striking parallels between the Buddhist picture of the multiple universe and modern cosmological theories. (shrink)
It is therefore most appropriate that Yoga and Indian philosophy be given equal attention both in the context of academic research and in the framework of ...
Homology is among the most important comparative concepts in biology. Today, the evolutionary reinterpretation of homology is usually conceived of as the most important event in the development of the concept. This paradigmatic turning point, however important for the historical explanation of life, is not of crucial importance for the development of the concept of homology itself. In the broadest sense, homology can be understood as sameness in reference to the universal guarantor so that in this sense the different concepts (...) of homology show a certain kind of “metahomology”. This holds in the old morphological conception, as well as in the evolutionary usage of homology. Depending on what is (or was) taken as a guarantor, different types of homology may be distinguished (as idealistic, historical, developmental etc.). This study represents a historical overview of the development of the homology concept followed by some clues on how to navigate the pluralistic terminology of modern approaches to homology. (shrink)
Colour plays a fundamental role in the philosophical treatments of painting. Colour while it is an essential part of the work of art cannot be divorced from the account of painting within which it is articulated. This paper begins with a discussion of the role of colour in Schelling's conception of art. Nonetheless its primary concern is to develop a critical encounter with Jean-François Lyotard's analysis of the Dutch painter Karel Appel. The limits of Lyotard's writings on painting, which (...) this paper will attribute in part to Lyotard's ‘empiricism’, becomes most apparent in his treatment of colour. (shrink)
In this paper, the author analyzes critically some of the ideas found in Karel Lambert's recent book, Meinong and the Principle of Independence (Cambridge: Cambridge University Press, 1983). Lambert attempts to forge a link between the ideas of Meinong and the free logicians. The link comes in the form of a principle which, Lambert says, these philosophers adopt, namely, Mally's Principle of Independence, which Mally himself later abandoned. Instead of following Mally and attempting to formulate the principle in the (...) material mode as the claim that an object can have properties without having any sort of being, Lambert formulates the principle in the formal mode, as (something equivalent to) the rejection of the traditional constraint on the principle of predication. The principle of predication is that a formula of the form Fa' is true iff the general term F' is true of the object denoted by the object term a'. The traditional constraint on this predication principle is that for the sentence Fa' to be true, not only must the object term have a denotation, but it must also denote an object that has being. According to Lambert, the free logicians violate this constraint by suggesting that Fa' can be true even if the object term has no denotation, whereas Meinong violates this constraint by proposing Fa' can be true even when the object term denotes an object that has no being. Lambert then tries to `vindicate' the Principle of Independence, thereby justifying both the work of the free logicians and Meinong. (shrink)
The aim of this paper is to compare the contents of the Lotus S?tra and the style of presentation of its message with the thrust of the Buddha's teachings as they are preserved in the early Buddhist sources, particularly the Sutta Pi aka of the P?li Canon, and also in the P?li commentarial literature. In the process it attempts to identify in the early sources the precedents of some of the bold statements in the Lotus S?tra which appear as complete (...) innovations, but may be elaborations of elements contained in P?li sources in germinal form. Despite the difference in style, language and mythological imagery, the conclusion is that both the Sutta Pi aka and the Lotus S?tra express in their respective manners the true spirit of the Buddhist message. Attention is drawn also to the striking parallels between the Buddhist picture of the multiple universe and modern cosmological theories. (shrink)
Those who want to interpret the quantifier ? (3 x) (. . .x. . .)'as having no existence commitment often fail to distinguish between this objective and that of merely changing the values of the variables. The confusion vitiates solutions of the singular existence anomalies which purport to be based on a non?existential interpretation of the quantifier. An example of one who makes the distinction but still interprets the particular quantifier non?existentially is offered by Czeslaw Lejewski. Objection to the classical (...) interpretation of the quantifiers often runs hand in hand with aversion to extensional logic. However, it is at least arguable that such an aversion is the result of underestimating the resources of extensional logic. These points arc discussed in the wake of Professor Marcus's recent paper in this journal ?Interpreting Quantification? (shrink)
The independent emergence of similar features in phylogenetically non-allied groups of organisms has usually been explained as the result of similar selection pressures particular to specific environments. This explanation has been more or less helpful in elucidating convergent resemblances among organisms since the times of Darwin. Nevertheless, intensive research has brought new knowledge on the emergence of structural similarity among organisms, especially during the last two decades. We now have manifold evidence of the phenomena of evolutionary re-entries or re-evolution, which (...) happens when a particular character present in one organic taxon also appears in another taxon which does not share an immediate ancestry. This is not the re-appearance of the same character, but rather of a similar one. Here I propose a model of threefold origin of similar phenotypic features in unrelated organisms stemming from intrinsic, extrinsic and semiosic causation. It is suggested that neither externalist nor internalist explanations per se, nor any combination thereof, are sufficient to cover all the manifold instances of character re-evolution. There is also a special group of resemblances that consists of what is originated, shaped, and retained in evolution due to meaning attributed to them by particular organic subjects. These cases cannot be fully understood without inviting a biosemiotic approach. Integrating Uexkull’s theory of meaning with the recent evolutionary developmental perspective could complete our understanding of phenotypic re-evolution. (shrink)
Palmer's attempt to dust off Locke's construct of “inverted spectrum” is discussed here to examine its plausibility. Perceptual inversion could be fulfilled by adopting the notion of “inverted trichromacy” rather than by the proposed existence of “red-green reversed trichromats.” Although the former alternative conforms to a hypothetical world of vampires, it fails to conform to the realities of genetics and neuroscience.
This essay lays out the leading principles of the theories of definite descriptions advocated by Frege, Russell, and Hilbert and Bernays, and discusses various difficulties, philosophical and otherwise, with each treatment, fixing especially on the treatment of singular existence claims. Then the leading principles of free (definite) description theory are presented and it is shown how it resolves difficulties confronting the more traditional approaches. Finally, a pair of technical problems in free (definite) description theory are addressed. They help to show (...) the fecundity of this treatment of definite descriptions. (shrink)
We prove that Standardization fails in every nontrivial universe definable in the nonstandard set theory BST, and that a natural characterization of the standard universe is both consistent with and independent of BST. As a consequence we obtain a formulation of nonstandard class theory in the ∈-language.
Meinong's theory of impossible objects is defended against a number of objections, in particular against Karel Lambert's argument (see Impossible Objects?, Inquiry, Vol. 17 [1974], pp. 303?14) that no objects are impossible.
A free logic is one in which a singular term can fail to refer to an existent object, for example, `Vulcan' or `5/0'. This essay demonstrates the fruitfulness of a version of this non-classical logic of terms (negative free logic) by showing (1) how it can be used not only to repair a looming inconsistency in Quine's theory of predication, the most influential semantical theory in contemporary philosophical logic, but also (2) how Beeson, Farmer and Feferman, among others, use it (...) to provide a natural foundation for partial functions in programming languages. Vis à vis (2), the question is raised whether the Beeson-Farmer-Feferman approach is adequate to the treatment of partial functions in all programming languages. Gumb and the author say No, and suggest a way of handling the refractory cases by means of positive free logic. Finally, Antonelli's solution of a problem associated with the Gumb-Lambert proposal is mentioned. (shrink)
Public debate on acceptable farm animal husbandry suffers from a confusion of tongues. To clarify positions of various stakeholder groups in their joint search for acceptable solutions, the concept of animal welfare was split up into three notions: no suffering, respect for intrinsic value, and non-appalling appearance of animals. This strategy was based on the hypothesis that multi-stakeholder solutions should be based on shared values rather than on compromises. The usefulness of such an artificial value distinction strategy was tested in (...) a small series of experiments. The results demonstrate that the chosen concept to distinguish between values is effective in a stakeholder context. Farmers’ views on doing good to animals appeared to be largely based on their value to prevent suffering and predominantly focused on the provision of regular care. Their priority for this value is clearly shared with other stakeholders, providing a basis for joint solutions. The concept of intrinsic value does not play a discernable role in farmers’ considerations. Based on the varying views on welfare, it can be inferred that there is a gradual rather than a principal difference between government legislation and farmers’ values, whereas public perception and acceptance of farm practices remains complicated. Distinction between value groups and focusing on a selected notion (such as no suffering) proved to be effective in bringing representatives of stakeholder groups together, but is unlikely to bridge the emotional gap between commercial farm practices and public ideals. (shrink)
Harald Ofstad: An Inquiry into the Freedom of Decision, Universitetsforlaget, Oslo, George Allen & Unwin, London, 1961. 391 pp. 42 N. Kr?, 42/?, $ 7.00 Some remarks on singular terms A review discussion of Henry S. Leonard's The Principles of Bight Reason, Henry Holt, New York 1957, 620 pp.
This essay argues for the importance of developing theories of nonexistent objects. The grounds are utility and smoothness of logical theory. In the latter case a parallel with the theory of negative and imaginary numbers is exploited. The essay concludes with a counterexample to a general argument against the enterprise of developing theories of nonexistent objects, and outlining the foremost problem an adequate theory of nonexistent objects must solve.
The irreversibility effect implies that a decision maker who neglects the prospect of receiving more complete information at later stages of a sequential decision problem will in certain cases too easily take an irreversible decision, as he ignores the existence of a positive option value in favour of reversible decisions. This option value represents the decision maker's flexibility to adapt subsequent decisions to the obtained information. In this paper we show that the economic models dealing with irreversibility as used in (...) environmental and capital investment decision making can be extended to emergency response decisions that produce important irreversible effects. In particular, we concentrate on the decision whether or not to evacuate an industrial area threatened by a possible nuclear accident. We show in a simple two-period evacuation decision model that non-optimal conclusions may be drawn when evacuation is regarded as a `now or never decision'. The robustness of these results is verified by means of a sensitivity analysis of the various model parameters. The importance of `options thinking' in this decision context is illustrated in an example. (shrink)
Pork producers in Western Europe moreand more encounter a variety of societalconcerns about pork and pork production. Sofar, however, producers predominantly focusedon low consumer prices, therewith addressingjust one concern. This resulted in an intensiveand large-scale production system, decreasinglyrelated to the area of farm land, andaccompanied with increasing concerns aboutsafety and healthiness of pork, animal welfare,environmental pollution, and others.An overview was given of possible concernsabout West-European pork production with theconsumers, citizens, and producers, and thoseconcerns are traced back to the pork productionsystem. (...) The various kinds and qualities ofinformation about the pork production system onwhich possible concerns are based have beenworked out extensively in this paper. Knowledgeabout the aspects of pork production that cangive rise to concerns can be used in two ways.First, the communication about those aspectstowards consumers and citizens can be adjustedor extended to give them better possibilitiesto make food choices or to develop their ownopinions about pork production. Second,producers could change the pork productionsystem such that it better satisfies consumersand citizens. Such adaptations are wellpossible, as three pork quality schemes, whichhave been evaluated, illustrate. However, mostof these adaptations can only be carried out atthe cost of the present low consumer prices andwill not occur spontaneously on a large scale.Therefore, accounting for the type andrelevance of the concerns, legislation isnecessary to address societal concerns in abalanced way such that pork production systemsbecome acceptable for the majority of oursociety. (shrink)
This article considers the uncommon situation surrounding the acceptance of Darwinism in nineteenth-century Bohemia, when the diffusion and interpretation of Darwin’s teachings were first undertaken, above all by two professors of aesthetics at Prague – Josef Durdík and Otakar Hostinský. Although they somewhat simplified the theory of natural selection, they understood Darwin’s theory to be the arrival of a new paradigm in contrast to contemporary biologists working in the Bohemian Lands. This article presents and compares both aestheticians’ interpretations of Darwinism, (...) mainly their stance on the theory of natural selection, the possibilities of applying this theory to aesthetics and art, as well as their relationship to Darwin’s interpretation of aesthetic phenomena in nature. (shrink)
The article discusses several possible interpretations of Socrates’ suggestion that we cannot “understand the nature of soul satisfactorily without understanding the nature of the whole” (Phaedrus 270c1–2). Against those who take the “whole” implied here for the cosmic whole, it argues that nothing in the Phaedrus justifies this interpretation. In the light of both Socrates’ conception of rhetoric in this dialogue and his image of the tripartite soul in the palinode, the “whole” whose knowledge is prerequisite to knowing the soul’s (...) nature is better understood as either the whole of the composed soul or the whole soul-body compound. The real problem of the passage, the article concludes, is that we lack any clear criteria that would enable us to decide between these two readings. At the same time, the dramatic progress of the dialogue makes it possible to argue that Phaedrus briefly misunderstands Socrates’ meaning by reading in it some cosmological connotations. This possibility notwithstanding, it is more likely that, from the perspective of the tripartite soul and its actions and passions, “the whole soul-body compound” and “the whole soul” are two equally defensible solutions to the puzzle. (shrink)
Il est question de la connaissance de soi telle qu’elle est recommandée et analysée par Socrate dans le Premier Alcibiade de Platon. Tout en prenant en compte le double contexte de la littérature grecque (et plus spécialement de l’OEdipe roi de Sophocle) et des autres dialogues (surtout du Phèdre), l’article reconstruit la série de tensions entre l’effort de fournir une définition générale de ce qu’est l’homme et la tâche de se connaître soi-même en tant qu’individu. Sans perdre de vue le (...) progrès de la division par laquelle Socrate arrive à cerner la source commune, mais difficile à décrire comme telle, de notre capacité épistémique et de la tempérance dans nos actions, il prête attention au redoublement répété d’une méréologie de l’homme et de l’âme par le vocabulaire de la puissance, voire du pouvoir politique. Apparaissent ainsi dans une lumière nouvelle les articulations du schéma de l’activité instrumentale (technê) et le modèle catoptrique, ainsi que le rôle de l’analogie et de la synecdoque comme des figures partagées par la pensée et par la parole qui essaient d’en offrir une sorte d’anatomie descriptive, destinée à suppléer la définition de l’homme en captant le reflet du divin en son âme. L’article conclut que l’ambiguïté de toute description d’un tel reflet ne diminue pas l’impact de l’analyse de l’âme par Socrate. (shrink)
