 Interestingly, the critical method of analysis of the reductio type (prasaṅga) which Jayarāśi so amply uses is basically absent in the works of the Digambara philosopher Akalaṅka, whereas the method is regularly used by his commentator Vidyānanda and all subsequent Jaina thinkers, which may have its historical relevance and suggest that Jayarāśi was posterior to Akalaṅka.