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# Catuskoti

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### Catuskoti

1. 1. Catuṣkoṭi චතුස්කකෝටිකය - Tetralemma
2. 2. Aristotelian logic (Binary Logic) A Not-A ද්විකකෝටිකය
3. 3. Aristotelian logic • Logic of Modern Science • Studied in Mathematics, Philosophy, Computer Science and Arts • Independent of the Observer (Objective Reality)
4. 4. Catuṣkoṭi A Not-A Both A & Not-A Neither A Nor Not-A
5. 5. Relation Problem (නෑදෑ ප්රශ්නය) Mihindu Thero: Great King, Do you have relatives? (මහරජ, ඔබට නෑකයෝ සිටිත්ද?) King Dev: Yes, Venerable Sir. ( එකසේය ස්වාමීනි.) Mihindu Thero: Great King, Do you have non- relatives? (මහරජ, ඔබට කනොනෑකයෝ සිටිත්ද?) King Dev: Yes, Venerable Sir. (එකසේය ස්වාමීනී.)
6. 6. Relation Problem (නෑදෑ ප්රශ්නය) Mihindu Thero: Great King, Is there anyone that is not a relative or yours nor a non- relative of yours? (මහරජ, එකසේ නෑකයෝත් කනොවන, කනොනෑකයෝත් කනොවන තවත් අය සිටිත්ද?) King Dev: Yes, Venerable Sir. That is me. (එකසේය ස්වාමීනී. ඒ මමය.)
7. 7. Relation Problem in Set Theory • Where do we put the King???? All Humans Non- Relatives Relatives
8. 8. Catuṣkoṭi in our culture • “යන එන ගමන්” - coming “and” going • “අඩු වැඩිය” - more “and” less • Attitudes • Gestures
9. 9. Chatuṣkoṭi in Buddhist Philosophy • නත කසෝ නත අඤ්කඤෝ - (the one who is reborn) is not the same person nor is another. • In Aristotelian Logic this is impossible. • In Catuṣkoṭi this is possible.
10. 10. Is Chatuṣkoṭi Dead? • Quantum Mechanics (Wave-Particle duality) • Copenhagen interpretation (Heisenberg's uncertainty principle) • Quantum Computing (Qubit) • Reality?
11. 11. References • 1963 Early Buddhist Theory of Knowledge. – K.N. Jayatillake, Publisher: George Allen and Unwin. • Concept and Reality in Early Buddhist Thought – Ven. Katukurunde Knanananda http://www.seeingthroughthenet.net/files/eng/books/other/concept_and_reali ty.pdf • The Magic of the Mind – Ven. Katukurunde Knanananda http://www.seeingthroughthenet.net/files/eng/books/other/the_magic_of_the _mind.pdf • අකප් ප්‍රවාද 1, 2, 3 (Our theories) - Nalin De Silva
12. 12. Thank You.