This paper questions a few assumptions of Gaṅgeśa Upādhyāya’s theory of ordinary verbal cognition (laukika-śābdabodha). The meaning relation (vṛtti) is of two kinds: śakti (which gives us the primary referent of a word) and lakṣaṇā (which yields the secondary referent). For Gaṅgeśa, the ground (bīja) of lakṣaṇā is a sort of inexplicability (anupapatti) pertaining to the composition (anvaya) of word-meanings. In this connection, one notices that the case of lakṣaṇā is quite similar to that of one variety of postulation, namely, (...) śrutārtāthāpatti, where the subject hears only a part of a sentence and immediately grasps the words that are needed to render the sentential meaning complete. Unless he does that, sentential meaning, i.e., the composition (anvaya) of word-meanings shall suffer from the same inexplicability that characterizes instances of lakṣaṇā. In fact, in the ‘Śaktivāda’ section of Tattvacintāmaṇi, Gaṅgeśa himself draws a parallel between the cognition of sentential meaning in a śrutārthāpatti-like case and the cognition of sentential meaning in an instance of lakṣaṇā. However, Gaṇgesa himself treats Śrutārthāpatti as a piece of inferential cognition. If there is no fundamental difference between cases of śrutārthāpatti and cases of lakṣaṇā, then the cognition of sentential meaning in instances of lakṣaṇā must also be inferential in essence. In that case, we must admit, against Gaṅgeśa’s view, that such cognition of sentential meaning cannot be accommodated within the framework of verbal cognition (śābdabodha). Therefore, I conclude that some revision is needed in Gaṅgeśa’s theory of verbal cognition with respect to lakṣaṇā. (shrink)

The meaning of the term ‘tarka’ is not clear in the modern literature on Classical Indian Philosophy. This paper will review different modern readings of this term and try to show that what the Nyāyasūtra and its classical commentaries called a ‘tarka’ should be understood as the following: a tarka is a cognitive act that validates a content (of a doubt or a cognition or a speech-act) by demonstrating its logical fitness or invalidates a content by demonstrating its logical unfitness. (...) A tarka can act as a metatheory too. Generating certainty is, according to the Classical Nyāya, a job assigned to an epistemic instrument ( pramāṇa ). It fails to do so when there arises a doubt regarding it. The moment a tarka dispels the doubt, the epistemic instrument generates certainty. Tarkas of different types will be exemplified by critically analyzing Gaṅgeśa’s applications of tarka in his magnum opus Tattvacintāmaṇi . These examples will clarify the definition of tarka formulated in this paper. (shrink)

The technical term “ tarka ” in the Nyāya tradition is the object of the present investigation. Diverse texts including Buddhist ones exhibit a negative estimation of activities using tarka . In contrast, more often than not, later treatises dealing with logico-epistemic problems, especially certain Naiyāyika works, identify the methodological peculiarity of Nyāya with tarka . Such an ambivalent attitude toward tarka can be understood in a coherent way if the essential features of tarka that gave rise to it can (...) be grasped. Starting from the Nyāyasūtra 1.1.40 and the explanation given in the Nyāyabhāṣya on it, the present researcher sorted out three characteristic features of tarka in the early Nyāya tradition. These three features focus on the main feature of tarka : namely, reflective analysis without requiring further factual information on the object of investigation. Based on this, the present researcher critically reviewed what promoted an understanding of tarka as a reductio ad absurdum argument or an a priori reasoning. Furthermore, certain passages from the Nyāyamañjarī , Nyāyakalikā , and Tarkasaṅgraha were examined to demonstrate that the present researcher’s interpretative understanding of tarka was adequate for explaining the usage of this term in a broad sense, with positive connotations. (shrink)

This book is a defence of a form of realism which stands closest to that upheld by the Nyãya-Vaid'sesika school in classical India. The author presents the Nyãya view and critically examines it against that of its traditional opponent, the Buddhist version of phenomenalism and idealism. His reconstruction of Nyãya arguments meets not only traditional Buddhist objections but also those of modern sense-data representationalists.

How do we go about weighing evidence, testing hypotheses, and making inferences? The model of " inference to the best explanation " -- that we infer the hypothesis that would, if correct, provide the best explanation of the available evidence--offers a compelling account of inferences both in science and in ordinary life. Widely cited by epistemologists and philosophers of science, IBE has nonetheless remained little more than a slogan. Now this influential work has been thoroughly revised and updated, and features (...) a new introduction and two new chapters. Inference to the Best Explanation is an unrivaled exposition of a theory of particular interest in the fields both of epistemology and the philosophy of science. (shrink)

We frequently use single words or expressions to mean multiple things, depending upon context. I argue that a plausible model of this phenomenon, known as lakṣaṇā by Indian philosophers, emerges in the work of ninth-century Kashmiri Mukulabhaṭṭa. His model of lakṣaṇā is sensitive to the lexical and syntactic requirements for sentence meaning, the interpretive unity guiding a communicative act, and the nuances of creative language use found in poetry. After outlining his model of lakṣaṇā, I show how arthāpatti, or presumption, (...) forms the basis of both semantic and pragmatic processes in this approach. I employ a model from contemporary linguist James Pustejovsky as one way of reconstructing Mukulabhaṭṭa’s analysis. Finally, I argue that presumption is responsible for the wide range of interpretations in creative uses of language, and that our interpretations are constrained, through defeasible in a way that our decodings of literal meanings typically are not. (shrink)

Essential to Peirce's distinction among three kinds of reasoning, deduction, induction and abduction, is the claim that each is correlated to a unique species of validity irreducible to that of the others. In particular, abductive validity cannot be analyzed in either deductive or inductive terms, a consequence of considerable importance for the logical and epistemological scrutiny of scientific methods. But when the full structure of abductive argumentation — as viewed by the mature Peirce — is clarified, every inferential step in (...) the process can be seen to dissolve into familiar forms of deductive and inductive reasoning. Specifically, the final stage is a special type of practical inference which, if correct, is deductively valid, while the creative phase, surprisingly, is not inferential at all. In neither is abduction a type of inference to the best explanation. The result is a major reassessment of the relevance of Peirce's views to contemporary methodological studies. (shrink)

This paper questions a few assumptions of Gaṅgeśa Upādhyāya’s theory of ordinary verbal cognition (laukika-śābdabodha). The meaning relation (vṛtti) is of two kinds: śakti (which gives us the primary referent of a word) and lakṣaṇā (which yields the secondary referent). For Gaṅgeśa, the ground (bīja) of lakṣaṇā is a sort of inexplicability (anupapatti) pertaining to the composition (anvaya) of word-meanings. In this connection, one notices that the case of lakṣaṇā is quite similar to that of one variety of postulation, namely, (...) śrutārtāthāpatti, where the subject hears only a part of a sentence and immediately grasps the words that are needed to render the sentential meaning complete. Unless he does that, sentential meaning, i.e., the composition (anvaya) of word-meanings shall suffer from the same inexplicability that characterizes instances of lakṣaṇā. In fact, in the ‘Śaktivāda’ section of Tattvacintāmaṇi, Gaṅgeśa himself draws a parallel between the cognition of sentential meaning in a śrutārthāpatti-like case and the cognition of sentential meaning in an instance of lakṣaṇā. However, Gaṇgesa himself treats Śrutārthāpatti as a piece of inferential cognition. If there is no fundamental difference between cases of śrutārthāpatti and cases of lakṣaṇā, then the cognition of sentential meaning in instances of lakṣaṇā must also be inferential in essence. In that case, we must admit, against Gaṅgeśa’s view, that such cognition of sentential meaning cannot be accommodated within the framework of verbal cognition (śābdabodha). Therefore, I conclude that some revision is needed in Gaṅgeśa’s theory of verbal cognition with respect to lakṣaṇā. (shrink)

This paper is in two parts. The first presents an analysis of the epistemology underlying the practice of classical Indian mathematical astronomy, as presented in three works of Nīlakaṇṭha Somayāji (1444–1545 CE). It is argued that the underlying concepts put great value on careful observation and skill in development of algorithms and use of computation. This is reflected in the technical terminology used to describe scientific method. The keywords in this enterprise include parīkṣā, anumāna, gaṇita, yukti, nyāya, siddhānta, tarka and (...) anveṣaṇa. The concepts that underlie these terms are analysed and compared with such ideas as theory, model, computation, positivism, empiricism etc. In a short second part, it is proposed that the primacy awarded to number and computation in classical Indian science led to an artificial language that did include equations but emphasized displays that facilitated calculation, as in the Bakshali manuscript (800 CE?). It is further argued that echoes of these concepts can be recognized in current science, where computation is once again playing a greater role triggered by spectacular developments in computer technology. (shrink)

In this benchmark five-volume study, originally published between 1922 and 1955, Surendranath Dasgupta examines the principal schools of thought that define Indian philosophy. A unifying force greater than art, literature, religion, or science, Professor Dasgupta describes philosophy as the most important achievement of Indian thought, arguing that an understanding of its history is necessary to appreciate the significance and potentialities of India's complex culture. Volume I offers an examination of the Vedas and the Brahmanas, the earlier Upanisads, and the six (...) systems of Indian philosophy. (shrink)

We perform conceptual acts throughout our daily lives; we are always judging others, guessing their intentions, agreeing or opposing their views and so on. These conceptual acts have phenomenological as well as formal richness. This paper attempts to correct the imbalance between the phenomenal and formal approaches to conceptualization by claiming that we need to shift from the usual dichotomies of cognitive science and epistemology such as the formal/empirical and the rationalist/empiricist divides—to a view of conceptualization grounded in the Indian (...) philosophical notion of “valid cognition”. Methodologically, our paper is an attempt at cross-cultural philosophy and cognitive science; ontologically, it is an attempt at marrying the phenomenal and the formal. (shrink)

When somebody speaks metaphorically, the primary meanings of their words cannot get semantically connected. Still metaphorical uses succeed in conveying the message of the speaker, since lakṣaṇā, a meaning-generating faculty of language, yields the suitable secondary meanings. Gaṅgeśa claims that lakṣaṇā is a faculty of words themselves. One may argue: “Words have no such faculty. In these cases, the hearer uses observation-based inference. They have observed that sometimes competent speakers use the word w in order to mean s, when p, (...) the primary meaning of w does not make any semantic sense. In all such cases, s is actually related to p. After having observed this, when the hearer hears the utterance of w, and realizes that w’s primary meaning p is semantically unfit for the sentence-meaning, they infer on the basis of their prior observation that ‘the competent speaker must mean s by uttering w’. Thus lakṣaṇā becomes a success.” This apparently well-argued reduction does not stand the critical examination; neither in Gaṅgeśa’s framework, nor even in the general theory of language. For one can compose and interpret potentially infinite novel sentences based on lakṣaṇā while the observational inferences one can make are finite. Gaṅgeśa says very clearly that as far as the secondary meaning is concerned, no prior observation is required. This paper will argue that not only does language yield secondary meanings through lakṣaṇā, but it also restricts the use of secondary meanings; for one cannot mean just anything by saying something. Lakṣaṇā is a creative function with infinite potential within the limits set up by the language faculty. (shrink)