16 Categories

16 Padarthas: The Nyaaya School holds that the logical method, of ascertaining truths was by the application of the sixteen categories or Padaarthas- the topics for discussion. These topics are 1. Pramaana means of knowledge 2. Prameya- objects of enquiry 3. Samasya- doubt 4. Prayojana – purpose 5. Dristaanta – illustration, Siddhaanta- dogma or determinate truth 7. Avayava- syllogism or argument 8. Tarka – confutation 9. Nirnaya-ascertainment 10. Vaada discussion 11. Jalpa- wrangling and hairsplitting 12. Vitanda cavilling or raising objections 13. Hetvaabhaasa- fallacy 14. Chhala- perversion or unfair ambiguity 15. Jaati- futile objections 16. Nigraha sthaana- conclusion or the confounding of an adversary. http://www.mypurohith.com/Ayurveda/Ayurveda1.asp