The paper provides some introductory comments and a preliminary translation of Avicenna’s Burhān, IV, 2. I shall first set the stage by outlining the structure of the book (sec. 1). I will then briefly introduce (sec. 2) a number of notions that are dealt with in the first treatise of the Burhān (e.g. definition, description). Burhān, IV, 2 is split into two parts: the first focuses mainly on Aristotle’s An. Post., B, 4, whereas the second covers some of the (...) topics of B, 5 and B, 6. Accordingly, sec. 3 will be devoted to a cursory presentation of Aristotle’s arguments in An. Post., B, 4 along with a more detailed discussion of its Avicennan counterpart, focusing on the indemonstrability of definition; sec. 4, finally, will be a presentation of the second part of the chapter, concerning the relationship between definition and division. An English translation of the entire chapter is appended to the paper and is accompanied by some notes. (shrink)

The indispensability of the ‘postulate of practical reason with regard to Right’ to Kant's property argument in the Rechtslehre is now widely recognized. However, most commentators continue to focus their attention on the relation between the postulate and the deduction of the concept of intelligible possession. The nature of this relation remains a matter of dispute in part because the precise position of the postulate within chapter one of the Rechtslehre remains undecided. Given this, it is perhaps not surprising that (...) the related question has been neglected, as to why Kant should characterize the postulate of Right as a postulate of practical reason. Yet the fact that he does so is of some significance – especially if one recalls the definition in the Critique of Practical Reason of postulates of practical reason as practically necessary but theoretically indemonstrable propositions. What is of interest about this definition is not just the fact that it designates postulates as practically necessary and as theoretically indemonstrable at the same time – even more intriguing is the intimated relation between practical necessity and theoretical indemonstrability. Kant does not think the postulates' theoretical indemonstrability morally insignificant. To the contrary, their moral significance for us appears to be a function, in part, of their theoretical indemonstrability. (shrink)

"Alexander's commentary on Book 1 concerns the definition of Aristotelian syllogistic argument; its resistance to the rival Stoic theory of inference; and the character of inductive inference and of rhetorical argument. Alexander distinguishes inseparable accidents, such as the whiteness of snow, from defining differentiae, such as its being frozen, and considers how these differences fit into the schemes of categories. He speaks of dialectic as a stochastic discipline in which success is to be judged not by victory but by (...) skill in argument. Alexander also investigates the subject of ambiguity, which had been richly developed since Aristotle by the rival Stoic school."--BOOK JACKET. (shrink)

This paper challenges the first Gettier counterexample to the tripartite account of knowledge. Noting that 'the man who will get the job' is a description and invoking Donnellan's distinction between their 'referential' and 'attributive' uses, I argue that Smith does not actually believe that the man who will get the job has ten coins in his pocket. Smith's ignorance about who will get the job shows that the belief cannot be understood referentially, his ignorance of the coins in his pocket (...) shows that it cannot be understood attributively. An explanation for why Smith appeared to have justified true belief is given by distinguishing between 'belief' and 'belief in truth'. Smith believes the sentence 'the man who will get the job has ten coins in his pocket' to be true (he mistakenly believes that Jones will get the job, of whom he knows that he has ten coins in his pocket) (hence his 'belief'), the sentence is true (hence 'truth'), and he has sufficient reason to assent to it (hence his 'justification'). But he does not believe the proposition expressed. Hence he does not know it either. (shrink)

Agnotology is the study of how ignorance arises via circulation of misinformation calculated to mislead. Legates et al. had questioned the applicability of agnotology to politically-charged debates. In their reply, Bedford and Cook, seeking to apply agnotology to climate science, asserted that fossil-fuel interests had promoted doubt about a climate consensus. Their definition of climate ‘misinformation’ was contingent upon the post-modernist assumptions that scientific truth is discernible by measuring a consensus among experts, and that a near unanimous consensus exists. (...) However, inspection of a claim by Cook et al. of 97.1 % consensus, heavily relied upon by Bedford and Cook, shows just 0.3 % endorsement of the standard definition of consensus: that most warming since 1950 is anthropogenic. Agnotology, then, is a two-edged sword since either side in a debate may claim that general ignorance arises from misinformation allegedly circulated by the other. Significant questions about anthropogenic influences on climate remain. Therefore, Legates et al. appropriately asserted that partisan presentations of controversies stifle debate and have no place in education. (shrink)

This is the second volume in what will be a translation with full scholarly apparatus of the entire correspondence of St. Hildegard of Bingen. The translation follows Van Acker's definitive new edition of the Latin text, which is being published serially in Belgium by Brepols. As in that edition, the letters are organized according to the rank of the addressees. The first volume included ninety letters to and from the highest ranking prelates in Hildegard's world: popes, archbishops, and bishops. Volume (...) II comprises letters 91-217, in which Hildegard addresses lower-ranking spiritual leaders offering advice and consolation, and is particularly noteworthy for the correspondence with Guilbert of Gembloux, who provides a wealth of information about the saint and her spiritual gift. (shrink)

This is the second volume in what will be a translation with full scholarly apparatus of the entire correspondence of St. Hildegard of Bingen. The translation follows Van Acker's definitive new edition of the Latin text, which is being published serially in Belgium by Brepols. As in that edition, the letters are organized according to the rank of the addressees. The first volume included ninety letters to and from the highest ranking prelates in Hildegard's world: popes, archbishops, and bishops. Volume (...) II comprises letters 91-217, in which Hildegard addresses lower-ranking spiritual leaders offering advice and consolation, and is particularly noteworthy for the correspondence with Guilbert of Gembloux, who provides a wealth of information about the saint and her spiritual gift. (shrink)

The Greek astronomer and geometrician Apollonius of Perga produced pioneering written work on conic sections in which he demonstrated mathematically the generation of curves and their fundamental properties. His innovative terminology gave us the terms 'ellipse', 'hyperbola' and 'parabola'. The Danish scholar Johan Ludvig Heiberg, a professor of classical philology at the University of Copenhagen, prepared important editions of works by Euclid, Archimedes and Ptolemy, among others. Published between 1891 and 1893, this two-volume work contains the definitive Greek text of (...) the first four books of Apollonius' treatise together with a facing-page Latin translation. Volume 1 contains the first three books, with the editor's introductory matter in Latin. (shrink)

The Greek astronomer and geometrician Apollonius of Perga produced pioneering written work on conic sections in which he demonstrated mathematically the generation of curves and their fundamental properties. His innovative terminology gave us the terms 'ellipse', 'hyperbola' and 'parabola'. The Danish scholar Johan Ludvig Heiberg, a professor of classical philology at the University of Copenhagen, prepared important editions of works by Euclid, Archimedes and Ptolemy, among others. Published between 1891 and 1893, this two-volume work contains the definitive Greek text of (...) the first four books of Apollonius' treatise together with a facing-page Latin translation. Volume 2 contains the fourth book in addition to other Greek fragments and ancient commentaries, notably that of Eutocius, as well as the editor's Latin prolegomena comparing the various manuscript sources. (shrink)

The Greek astronomer and geometrician Apollonius of Perga produced pioneering written work on conic sections in which he demonstrated mathematically the generation of curves and their fundamental properties. His innovative terminology gave us the terms 'ellipse', 'hyperbola' and 'parabola'. The Danish scholar Johan Ludvig Heiberg, a professor of classical philology at the University of Copenhagen, prepared important editions of works by Euclid, Archimedes and Ptolemy, among others. Published between 1891 and 1893, this two-volume work contains the definitive Greek text of (...) the first four books of Apollonius' treatise together with a facing-page Latin translation. Volume 1 contains the first three books, with the editor's Latin introductory matter. Volume 2 contains the fourth book in addition to other Greek fragments and ancient commentaries, notably that of Eutocius. (shrink)

Since Mates’ seminal Stoic Logic there has been uncertainty and debate about how to treat the term anapodeiktos when used of Stoic syllogisms. This paper argues that the customary translation of anapodeiktos by ‘indemonstrable’ is accurate, and it explains why this is so. At the heart of the explanation is an argument that, contrary to what is commonly assumed, indemonstrability is rooted in the generic account of the Stoic epistemic notion of demonstration. Some minor insights into Stoic logic ensue.

The arguments of Fodor, Garret, Walker and Parkes [(1980) Against definitions, Cognition, 8, 263-367] are the source of widespread skepticism in cognitive science about lexical semantic structure. Whereas the thesis that lexical items, and the concepts they express, have decompositional structure (i.e. have significant constituents) was at one time "one of those ideas that hardly anybody [in the cognitive sciences] ever considers giving up" (p. 264), most researchers now believe that "[a]ll the evidence suggests that the classical [(decompositional)] view is (...) wrong as a general theory of concepts" [Smith, Medin & Rips (1984) A psychological approach to concepts: comments on Rey, Cognition, 17, 272], and cite Fodor et al. (1980) as "sounding the death knell for decompositional theories" [MacNamara & Miller (1989) Attributes of theories of meaning, Psychological Bulletin, 106, 360]. I argue that the prevailing skepticism is unmotivated by the arguments in Fodor et al. Fodor et al. misrepresent the form, function and scope of the decompositional hypothesis, and the procedures they employ to test for the psychological reality of definitions are flawed. I argue, further, that decompositional explanations of the phenomena they consider are preferable to their primitivist alternatives, and, hence, that there is prima facie reason to accept them as evidence for the existence of decompositional structure. Cognitive scientists would, therefore, do well to revert to their former commitment to the decompositional hypothesis. (shrink)

orbit and far beyond it. Indeed, the immense, painstaking, indefatigable and ever-improving effort of Husserl to find ever-deeper and more reliable foundations for the philosophical enterprise (as well as his constant critical re-thinking and perfecting of the approach and so called "method" in order to perform this task and thus cover in this source-excavation an ever more far-reaching groundwork) stands out and maintains itself as an inepuisable reservoir for philosophical reflec tion in which all the above-mentioned work has either its (...) core or its source. In fact, in his undertaking to re-think the entire philosophical enterprise as such and to recreate philosophy upon what he sought to be at least a satisfactorily legitimated basis, Husserl, through his already systematised and "authorized" work, and his courses, and later on in his spontaneous reflection (which did not find its way into a definitive corpus but was nevertheless sufficiently coherent with his previously established body of thought to be considered a continuation of it), uncovers perspectives upon the universe of man and projects their new philosophical thematisation that brings together all the attempts by philosophers (e. g., Merleau-Ponty, who drew upon this material and found there his own inspiration) who succeeded him with foundational intentions; it also gives a core of philosophical ideas and insights for the youngergenerationofphilosophers today. (shrink)

What follows is a summary of basic principles pertaining to the definitions used in constructing an ontology. A definition is a statement of necessary and sufficient conditions. What this means in the simplest case can be understood as follows. To say that ɸ‐ing is a necessary condition for being an A is just another way of saying that every A ɸ’s; to say that ɸ‐ing is a sufficient condition for being an A is just another way of saying that (...) everything that ɸ’s is an A. The goal in writing a definition is to specify a set of conditions of this sort which are all necessary, and which are jointly sufficient. (shrink)

Aristotle, in the Posterior Analytics, connects his account of definition and explanation with the theory of division. The features that figure in the relevant explanation include those that distinguish the kind in its relevant genus. His account of differentiation into genera and species is strongly interconnected with his explanation‐involving account of definition.

What role should the physician's conscience play in the practice of medicine? Much controversy has surrounded the question, yet little attention has been paid to the possibility that disputants are operating with contrasting definitions of the conscience. To illustrate this divergence, we contrast definitions stemming from Abrahamic religions and those stemming from secular moral tradition. Clear differences emerge regarding what the term conscience conveys, how the conscience should be informed, and what the consequences are for violating one's conscience. Importantly, these (...) basic disagreements underlie current controversies regarding the role of the clinician's conscience in the practice of medicine. Consequently participants in ongoing debates would do well to specify their definitions of the conscience and the reasons for and implications of those definitions. This specification would allow participants to advance a more philosophically and theologically robust conversation about the means and ends of medicine. (shrink)

In the modern discussions about possibility of synthetic a priori propositions, the theory of definition has a fundamental importance, because the most definition’s theories hold that analytic judgments are involved by explicit definition. However, for Kant –first author who pointed out the distinction between analytic and synthetic propositions–many analytic judgments are made by analysis of concepts which need not first be established by definition. Moreover, for him not all a priori knowledge is analytic. The statement that (...) not all analytic judgment is derived from definition and possibility of synthetic a priori knowledge, indicates Kant didn’t believe, contrary to modern theories about analytic judgment, the definition is an essential ground of knowledge. (shrink)

The paper revisits Sharvy's theory of plural definite descriptions. An alternative account of plural definite descriptions building on the ideas of plural quantification and non-distributive plural predication is developed. Finally, the alternative is extrapolated to account for generic uses of definite descriptions.

In this paper I argue that Kant’s doctrine of definitions, as it is developed in theTranscendental Doctrine of Method(TDM) and in the lectures on logic, lays down the semantic background of the problem of the objective reality of the categories and of the solution Kant provides for it in theTranscendental Analytic. The distinction between nominal and real definitions introduces a two-dimensional element in Kant’s theory of concepts, and this, I argue, provides a compelling explanation for the assumption Kant makes in (...) §13 that it is possible to possess a concept without knowing the conditions of its legitimate application. This view is supported by the parallels between Kant’s discussion of empirical, mathematical, and philosophical concepts in §13 and in theTDM. And, it allows clarifying the sense in which the arguments that prove the objective reality of the categories are, at the same time, counterfactual reflections that give us (incomplete) insight into their real definitions. (shrink)

The paper delves into manuscript sources connected with various disputations held at Prague University from around 1390 to 1420 and singles out a set of hitherto unknown quaestiones dealing with the nature of the human intellect and its relation to the body. Prague disputations from around 1400 arguably offer a unique vantage point on late medieval anthropological issues, since they encompass an entanglement of numerous doctrinal influences from Buridanian De anima commentaries to John Wyclif’s theories. The paper delineates several conceptual (...) tensions regarding the nature of the intellect, e.g., between materialism (entailed by the emphasis on the intellect’s inherence in the body) and personal immortality. It presents several strategies Prague masters employed to overcome these tensions. For example, an anonymous participant of the 1409 quodlibet develops the Buridanian distinction between the rationally demonstrable materialist tendency and the indemonstrable “catholic truth” about the intellect both inhering in and separable from the body. On the other hand, Wyclif’s adherents (Jacob of Mies and another anonymous master) postulate an immortal spirit hypostatically united to each human being beside the human soul educed from the potency of the matter. Yet, the boundaries between the doctrinal standpoints in question seem permeable, whereby a rigid definition of antagonistic groups in late medieval Prague intellectual milieu (e.g., Buridanians vs Wycliffites) is rendered ineffective. (shrink)

Definitions can be classified from two different points of view. We can ask what sort of statements definitions are, how they are to be justified, and what purpose they serve in the process of acquiring scientific knowledge. For lack of a simpler word, let us call a classification of definitions from this point of view epistemological. We can also distinguish different forms of definition; and a classification from this point of view is naturally called formal.

In the modern discussions about possibility of synthetic a priori propositions, the theory of definition has a fundamental importance, because the most definition’s theories hold that analytic judgments are involved by explicit definition . However, for Kant –first author who pointed out the distinction between analytic and synthetic propositions–many analytic judgments are made by analysis of concepts which need not first be established by definition. Moreover, for him not all a priori knowledge is analytic. The statement (...) that not all analytic judgment is derived from definition and possibility of synthetic a priori knowledge, indicates Kant didn’t believe, contrary to modern theories about analytic judgment, the definition is an essential ground of knowledge. (shrink)

There is a recent scholarly trend drawing similarities between Aristotle’s conceptions of ethics and demonstrative science. One such similarity has become widely and rightly recognized: for Aristotle both ethics and demonstrative science seek essential definitions of phenomena. The task of the paper is to show that German philosopher and classicist Hans-Georg Gadamer not only prefigured this interpretative trend, he also identified a problematic feature of Aristotle’s method so construed. The problematic feature is semantic. For Aristotle essential definitions must consist of (...) univocal terms, but such univocity cannot be maintained if the definienda and definientes are concepts to be usefully employed in everyday ethical judgements. Gadamer therefore points out a problematic tension in Aristotle’s ethics. On the one hand, ethical inquiry should have practical application, but, on the other hand, the semantic assumptions underlying inquiry imply that it cannot. (shrink)

We start by noting that the set-theoretic and semantic paradoxes are framed in terms of a definition or series of definitions. In the process of deriving paradoxes, these definitions are logically represented by a logical equivalence. We will firstly examine the role and usage of definitions in the derivation of paradoxes, both set-theoretic and semantic. We will see that this examination is important in determining how the paradoxes were created in the first place and indeed how they are to (...) be solved in a uniform way. There are three features that are special about these definitions used in the derivation of most of the above paradoxes. The first is the use of self-reference between the definiens and the definiendum, the second is the generality of the definiendum, and the third is the under-determination and over-determination of concepts that usually occur as a result of these definitions. We will examine the impact of these three features on the logical representation of definitions and show how this representation then leads to a uniform paradox solution using an appropriate logic that is both paraconsistent and paracomplete. However, it is the paracompleteness, exhibited through the rejection of the Law of Excluded Middle, together with the rejection of contraction principles, that enables the solution of the paradoxes to go through. We characterize definitions as involving syntactic identity and/or meaning identity. We point out that some paradoxes do not have explicit self-reference or circularity and some may not utilize the generality of the definiendum, but the general characterizations of definitions that we give will still apply. We also look beyond all this to paradoxes that rely on illicit definitions between objects that are essentially different to start with. (shrink)

The first section of this book surveys the development of Islamic philosophy though an examination of the definitions for substance, cause and matter. These important philosophical terms were defined by each new generation of philosophers. The definitions show an awareness of Greek philosophy, but also take metaphysical thought into an Islamic matrix. In the second section the author translates Ibn Sina's Kitab al-hudud and puts the tenth-century philosopher in his proper geopolitical sphere. Questions of Ibn Sina' connection with the East (...) as well as medieval scholastic philosophy are considered. Teaching Islamic philosophy outside of the Arabic-speaking world has been handicapped by a lack of primary texts in translation and studies of basic concepts. This book makes the foundation of this field more accessible to students and a general readership. By translating this little-known but pivotal text into readable English, Kennedy-Day has opened a door for a wider range of readers. (shrink)

In this paper, I use an example from the history of philosophy to show how independently defining each side of a pair of contrary predicates is apt to lead to contradiction. In the Euthyphro, piety is defined as that which is loved by some of the gods while impiety is defined as that which is hated by some of the gods. Socrates points out that since the gods harbor contrary sentiments, some things are both pious and impious. But “pious” and (...) “impious” are contrary predicates; they cannot simultaneously characterize the same thing. Euthyphro changes his definition, but the problem of recognizing emotional ambivalence is only side-stepped. I go on to show how contemporary philosophers run into a similar problem. According to Prinz, something is good if and only if we harbor positive sentiments towards it and bad if and only if we harbor negative sentiments towards it. Thus, if we are ambivalent towards something (if we harbor both positive and negative sentiments towards it), then it is both good and bad. Like “pious” and “impious”, “good” and “bad” are contraries. Next, according to the fitting-attitude theory first elaborated by Brentano and favored by contemporary meta-ethicists like Blackburn, Brandt, Ewing, Garcia, Gibbard, McDowell, and Wiggins, something is good if and only if it is a fitting (appropriate) object of approbation, and something is bad if and only if it is a fitting (appropriate) object of disapprobation. I argue that moral ambivalence is sometimes appropriate, i.e., that the correct response to some things is to both love and hate them. Hence, according to the fitting-attitudes theory, some things are both good and bad. I conclude by discussing a variety of ways in which the problem of ambivalence may be solved, suggesting that attitudes of approbation and disapprobation be further individuated by the reasons for them. (shrink)

A unified theory is offered to account for three types of definite descriptions: with singular, plural, & mass predicates, & to provide an account for the word the in descriptions. It is noted that B. Russell's analysis ("On Denoting," Mind, 1905, 14, 479-493) failed to account for plural & mass descriptions. The proposed theory differs from Russell's only by the substitution of the notation (less than or equal to) for Russell's =. It is suggested that for every predicate G there (...) is an appropriate "part of" or "some of" relation on the extension of G. For singular predicates, (less than or equal to) becomes just the identity relation =. The predicate G is formulated as "the G" & analyzed with the formula ((schwa)x) (Gx . (Gy (includes) yy (less than or equal to) x)), which accounts for all cases of definite descriptions. It is suggested that the primary use of the is not to indicate uniqueness, but totality. C. Ornatowski. (shrink)

Keenan (1987) observed that trivial determiners built from basic existential determiners (e.g.,either zero or else more than zero) are allowed inthere-insertion contexts, and that trivial determiners built from basic non-existential determiners (e.g.,either all or else not all) are not. This result is unexpected under the analyses ofthere-sentences proposed in Barwise and Cooper (1981), Higginbotham (1987), and Keenan (1987). I argue that the class of NPs barred from the postverbal position ofthere-sentences (strong NPs) is correctly characterized in presuppositional terms, as suggested (...) in de Jong and Verkuyl (1985) and Lumsden (1988). According to this characterization, strong NPs share one of the defining components of definiteness proposed in Heim (1982), namely the Descriptive Content Condition (DCC). How to derive the prohibition against strong NPs inthere-insertion contexts (definiteness effect) from the fact that strong NPs meet the DCC is not obvious, however. I argue that accounting for this prohibition involves regarding the XP-coda in [there be NP XP] as providing the contextual domain for the interpretation of the postverbal NP. (shrink)

The scope of this short paper is to show that the examples Ilhan Inan uses to undermine Donnellan's distinction (primarily, the attributive uses of definite descriptions in general) fall short on account of wrong interpretation those examples were provided with in his paper. Whilst Ilhan Inan showed how complex definite descriptions (having an embedded referential term) may cause doubts as to which category they should be put in, these referring terms only play a secondary role. I argue that all of (...) his three key examples are, in fact, sheer attributive uses of definite descriptions and have to be taken as such, which seriously diminishes the pedestal Inan places his argument on. (shrink)

Definition is viewed in this paper as a cohesive element of theory, providing links between scientific constructs. The problem is approached first in terms of three orders--the historical, the logical, and the heuristic--in which the structure of science may be put together; a study of these is necessary if difficulties about priority of definition are to be resolved. The main part of the paper is devoted to an exercise in theory-construction which illustrates the five principal functions of (...) class='Hi'>definition--the grounding of constructs in observation, their descriptive interrelation, the development of logico-mathematical calculi, the interpretation of these calculi, and the provision of precise, quasi-mathematical relations between the constructs themselves. Reference is made throughout to the many names for the defining process found in earlier works, and problems of contextual definition, reduction, stipulative and lexical definition, etc., are dealt with briefly. The theory thus constructed is represented diagrammatically. It is shown that the analysis may be simplified, in general terms, by the use of two new categories, "internal" and "external" definition; and that this innovation may prove helpful in clarifying some traditional obscurities, and in preserving a necessary balance between a purely logical and a purely empirical approach to the philosophy of science. (shrink)

ABSTRACT: Alexander of Aphrodisias’ commentaries on Aristotle’s Organon are valuable sources for both Stoic and early Peripatetic logic, and have often been used as such – in particular for early Peripatetic hypothetical syllogistic and Stoic propositional logic. By contrast, this paper explores the role Alexander himself played in the development and transmission of those theories. There are three areas in particular where he seems to have made a difference: First, he drew a connection between certain passages from Aristotle’s Topics and (...) Prior Analytics and the Stoic indemonstrable arguments, and, based on this connection, appropriated at least four kinds of Stoic indemonstrables as Aristotelian. Second, he developed and made use of a specifically Peripatetic terminology in which to describe and discuss those arguments – which facilitated the integration of the indemonstrables into Peripatetic logic. Third, he made some progress towards a solution to the problem of what place and interpretation the Stoic third indemonstrables should be given in a Peripatetic and Platonist setting. Overall, the picture emerges that Alexander persistently (if not always consistently) presented passages from Aristotle’s logical œuvre in a light that makes it appear as if Aristotle was in the possession of a Peripatetic correlate to the Stoic theory of indemonstrables. (shrink)

Contrary to a claim made by Kaplan (Mind 114:933–1003, 2005) and Neale (Mind 114:809–871, 2005), the readings available to sentences containing definite descriptions embedded under propositional attitude verbs and conditionals do pose a significant problem for the Russellian theory of definite descriptions. The Fregean theory of descriptions, on the other hand, deals easily with the relevant data.

To understand what ontologies do through their definitions, we propose a theoretical explanation of the functions of definitions in ontologies backed by empirical neuropsychological studies. Our goal is to show how these functions should motivate (i) the systematic inclusion of definitions in ontologies and (ii) the adaptation of definition content and form to the specific context of use of ontologies.

'What is art?' is one of the classic questions that philosophy has addressed over the ages, from the ancients to today. A discussion of the primary literature of the field introduces a series of considerations used to shift the problem of definition onto new plane, one that is able to respond to the challenges of the performing and participatory arts, which more than any other form of art present particularly unconventional ontologies.