Chronological Development of Jaina Logic
Summary
Jaina logic, which seeks to systematise reasoning in accordance with the principles of anekāntavāda and syādvāda, evolved over centuries. Early canonical texts contain dialogues illustrating non‑absolutism, but the first pure logic treatise is Siddhasena Divakara’s Nyāyāvatāra (c. 5th–6th century CE), which introduces basic principles of inference. His later work Sanmatitarka (The Logic of the True Doctrine) is considered the first major Jain logic text written in Sanskrit. It expounds a seven‑valued logic that allows propositions to be affirmed, negated or expressed in multiple ways, reflecting the Jain belief that truth is multifaceted. In the 8th century, Mallavadin composed Nayacakra and Dvadasaranayacakra, encyclopaedic works that compare various schools of Indian philosophy. Akalanka (720–780 CE) systematised Jaina logic through works like Nyāya‑viniścaya and Pramāṇa‑saṃgraha, defending Jain epistemology against Buddhist and Nyāya critiques. Prabhācandra and Abhayadeva continued this line by producing extensive commentaries and treatises on logic and epistemology. The tradition remained vibrant in the medieval period, with scholars like Vadideva and Hemachandra (11th–12th centuries) elaborating on syādvāda and the concept of conditional predication. In the 17th century Yaśovijaya, a scholar steeped in Navya‑Nyāya (New Logic), wrote over a hundred works and produced commentaries on earlier Jain logical texts. His adoption of Navya‑Nyāya terminology brought Jain logic into dialogue with contemporary philosophical trends. The article emphasises how each phase built on previous work, refining the methods of inference, the theory of viewpoints (naya) and the doctrine of conditionality. Jaina logic aimed not only at philosophical analysis but also at cultivating open‑mindedness, recognising that any statement is true only under certain conditions. By tracing the chronology from Siddhasena to Yaśovijaya, the article demonstrates Jainism’s sustained engagement with logical theory.
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Conclusion
Jaina logic developed from early canonical hints into a sophisticated philosophical discipline. Siddhasena Divakara’s Sanmatitarka established the first major logical treatise. Subsequent thinkers like Mallavadin, Akalanka and Prabhācandra expanded the system and defended it against rival schools. The tradition culminated in the Navya‑Nyāya–influenced works of Yaśovijaya, who wrote prolific commentaries. The chronological narrative reveals a continuous effort to articulate a logic that honours Jain principles of non‑absolutism and conditional predication.