The document discusses the concept of catuskoti, or tetralemma, in relation to Aristotelian logic and its implications in mathematics, philosophy, and quantum computing. It highlights the complexities of relationships, subjective reality, and the overlap of subjective experiences, challenging the notion of objective reality. References to Buddhist philosophy and modern science are included to illustrate the differences in perspectives regarding existence and observation.

1. C h atuṣkoṭi චතුස්කෝටිකය - Tetralemma

2. Aristotelian logic (Binarism) Positive configuration P Not-P Negative configuration - ( P ) - ( Not-P ) P Not-P

3. Aristotelian logic Logic of Modern Science Studied in Mathematics, Philosophy and Computer Science Independent of the Observer (Objective Reality)

4. C h atuṣkoṭi Positive configuration P Not-P Both P & Not-P Neither P Nor Not-P Negative configuration -- ( P ) -- ( Not-P ) -- ( Both P & Not-P ) -- ( Neither P Nor Not-P ) P Not-P Both P & Not-P Neither P Nor Not-P

5. Relation Problem ( නෑදෑ ප්රශ්නය ) Mihindu Thero: Great King, Do you have relatives? ( මහරජ , ඔබට නෑයෝ සිටිත්ද ?) King Dev: Yes, Venerable Sir. ( එසේය ස්වාමීනි .) Mihindu Thero: Great King, Do you have non-relatives? ( මහරජ , ඔබට නොනෑයෝ සිටිත්ද ?) King Dev: Yes, Venerable Sir. ( එසේය ස්වාමීනී .)

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 , එසේ නෑයෝත් නොවන , නොනෑයෝත් නොවන තවත් අය සිටිත්ද ?) King Dev : Yes, Venerable Sir. That is me. ( එසේය ස්වාමීනී . ඒ මමය .)

7. Relation Problem in Set Theory Where do we put the King???? All Humans Non-Relatives Relatives

8. C h atuṣkoṭi in our culture “ යන එන ගමන් ” is not coming “or” going nor coming “and” going. “ අඩු වැඩිය” is not more “or” less nor more “and” less. Attitudes Gestures

9. C h atuṣkoṭi in Buddhist Philosophy නත සෝ නත අඤ්ඤෝ - ( the one who is reborn) is not the same person nor is another. In Aristotelian Logic this is impossible. In C h atuṣkoṭi this is possible.

10. Quantum Computing Child of Quantum Theory/Quantum Mechanics Bit vs. Qubit Qubit can be 1, 0 or any ‘Superposition’ of those two values. (1,0,01,10) Cryptography, Modeling

11. Philosophical Implications of C h atuṣkoṭi Every observation is relative to the observer. (relation problem, Heisenberg uncertainty principle) No ‘objective reality’ ( වාස්තවික යථාර්තය ) Rather, objective reality is an illusion formed by the intersection of ‘subjective realities’ Contrary to the quest of Modern Science (e.g. theory of everything)

12. References http://en.wikipedia.org/wiki/Buddhist_logic http://en.wikipedia.org/wiki/Catuskoti http://en.wikipedia.org/wiki/Quantum_computer 1963 Early Buddhist Theory of Knowledge. – K.N. Jayatillake, Publisher: George Allen and Unwin. මගේ ලෝකය ( My World – English translation available) – Nalin De Silva අපේ ප්රවාද (Our theories) - Nalin De Silva

13. Thank You.