A reasoned argument or tarka is essential for a wholesome vāda that aims at establishing the truth. A strong tarka constitutes of a number of elements including an anumāna based on a valid hetu. Several scholars, such as Dharmakīrti, Vasubandhu and Dignāga, have worked on theories for the establishment of a valid hetu to distinguish it from an invalid one. This paper aims to interpret Dignāga’s hetu-cakra, called the wheel of grounds, from a modern philosophical perspective (...) by deconstructing it into a simple probabilistic mathematical model. The objective is to understand how and why a vāda based on a probabilistically weaker hetu can degrade into a Jalpa or vitaṇḍā. To do so, the paper maps the concept of ‘Bounded Rationality’ onto the hetu-cakra. Bounded Rationality, an idea coined by the management thinker Herbert Simon, is often employed in understanding decision-making processes of rational agents. In the context of this paper, the concept would state that the prativādin and ālocaka (debater) may not hold unbounded information to back their pratijñā (proposition). The paper argues that within the probabilistically deconstructed hetu-cakra model, most people argue in the ‘Zone of Bounded Rationality’, and thus, the probability of a debate degrading into Jalpa or vitaṇḍā is high. -/- . (shrink)

Health and disease are prime focus in the field of Indian medicine and exploration of cause as primary thirst in human being. Cause and effect in Ayurveda is discussed throughout Ayurvedic texts. A critical appraisal of karana(cause) from different point of view was done and it has been concluded that effect conceived in form of sign/symptoms in healthy or diseased must have certain cause. No individual cause can bring an effect until there is an interrelationship, inter-contact and interaction among causes. (...) Causes in Ayurveda has been explored in different contexts in form of causative factors for disease, dhatusamyata (health), cause for origin of shrishti (universe), purusha (human), garbha(foetus), karyadravya(existing matter), one cause for many effect, use of different synonyms like hetu, nidana, ayatana, nimitta, role of cause in therapeutics, cause as one important examination tool of dasha parikshya vishaya, cause as primary focus for research etc. were intervened. What is this cause? In which form has cause been described in Ayurveda? What are different names for these causes in Ayurveda? What are the different effects produced by causes? Analysis of karana from different point of view has been objective of this paper.. (shrink)

In this paper, Nāgārjuna’s philosophical interpretation of the terms kāraṇa and kārya is analysed after having methodologically confined the specific field of interest to the MMK. From the study of all the occurrences of kāraṇa and kārya in the MMK (listed in paragraph 2), it emerges that Nāgārjuna makes use of these two terms to refer to skandhas as causes (kāraṇa) of further skandhas as effects (kārya), hence conveying with this words the idea of, so to speak, subjectivity and (re)birth. (...) From the principal commentaries on the MMK (particularly Bhāviveka and Candrakīrti), we know also that, even when the reference of kāraṇa and kārya to skandhas is not explicitly pointed out by Nāgārjuna, it nonetheless can be inferred from the peculiar context in which these terms are employed. This conclusion seems to be confirmed also by the crosscheck analysis of the philosophical usage of the parallel terms hetu and phala, which refer either to, so to speak, objective (i.e., concerning general bhāvas) causes and effects, or – in the case of phala as consequence of karman/kriyā – to moral results (these two meanings are confirmed also by some passages from the Vigrahavyāvartanī), but in no cases Nāgārjuna makes recurse to hetu and phala to refer to what could be called a subjective (i.e., concerning skandhas) level of causality. To the paper an addendum is added, in which the commentaries on MMK 8.4 are taken into consideration. From this excursus it appears that at least Buddhapālita, Bhāviveka and Candrakīrti, by ‘overinterpreting’ the meaning of hetu in the kārika, are consequently forced to readapt the philosophical significance of kāraṇa and kārya in a way that does not fit so much with Nāgārjuna’s original message. (shrink)

proposition. Universal proposition is defined as the proposition in which the relation between the subject term and the predicate term is without any condition, in which the predicate is either affirmed or denied of the subject unconditionally. In nyaya logic the term vyapti is a universal proposition or invariable relation between the middle term (linga/hetu) and the major term (sadya) . According to the category of relation propositions are divided into categorical and the conditional. Although proposition is a logical (...) entity which is an assertion, either affirm or deny the subject. Truth and falsity are the values of proposition. Universal proposition is of two kinds: universal affirmative proposition and universal negative proposition while universality is the quantity of the subject and affirmation or negation is the quality of the proposition. Anumana (inference) is the knowledge of the objects which follows some other knowledge. In nyaya logic Inference is a combined deductive-inductive reasoning consisting of at least three categorical propositions and in it there are at least three propositions consisting of three terms, viz. the paksa or minor term about which we infer something, the sadhya or major term which inferred object, and the linga(probans) or sadana or middle which is invariably related to the major, and is present in the minor. Indian inference resembles to the categorical syllogism of western logic. In nyaya logic inference consisting of three propositions the first proposition is the conclusion of the syllogism , the second is the minor premise and last the major premise which is totally opposite of western logic. Syllogism of nyaya logic contains five propositions, called its Avayavas or members. These are pratijna, hetu, udarana, upanaya, and nigamana. Middle term have five characteristics in order to make five Figures of syllogism as Figure is the form of the syllogism. These five characteristics, or at least four of them , must be found in the middle term of a valid inference. If not, there will be fallacies(error in reasoning). Nyayikas give us three classifications of inference. According to first inference is of two kinds, namely, svartha and parartha. According to another inference is of three kinds, purvavat, sesavat and samanyatodrsta. According to third classification inference is distinguished into kevalanvayi, kevala-vyatireki and anvaya-vyatireki. (shrink)

The science-of-thought (Nyāya) has always been an integral part of the four constituents (anuyoga) – prathamānuyoga, karuņānuyoga, caraņānuyoga, and dravyānuyoga – of the Jaina Scripture. Through Parīkşāmukha Sūtra, Ācārya Māņikyanandi (circa 7th-8th century A.D.) churned the nectar of the science-of-thought (Nyāya) from the ocean of the words of the master-composers like Ācārya Samantabhadra and Bhaţţa Akalańka Deva. The valid-knowledge (pramāņa) ascertains the true nature of objects while the fallacious-knowledge (pramāņābhāsa) does the opposite. Parīkşāmukha Sūtra characterizes, as per the earlier authoritative (...) expositions and in brief, both these (pramāņa and pramāņābhāsa) for the benefit of the uninitiated learners. It is an essential canonical text that every knowledge-seeking householder and ascetic must try to master. (shrink)