Father of Buddhist Logic
Archarya Dignaga in the 6th century AD who wrote Pramanasamuccaya
4 Parts of a Complete Syllogism
1) Subject/ Topic
2) Predicate
3) Reason/ Sign
4) Illustration
1-3 are the thesis/ probandum. What you want to prove
3 Modes of a Valid/ Good Syllogism
1) Property of the subject - the topic must fulfill the reason
2) Forward Pervasion - anything that qualifies the reason should qualify the predicate
3) Reverse/ Counter Pervasion - whatever doesn’t fulfill the predicate should not fulfill the reason
4 Modes of Relationships
1) Mutually Inclusive/ Synonomous - A=B, B=A
2) Mutually Exclusive/Contradictory- A and B are always different (no common locus)
3) 3 Mu/ Three Mode - Whatever is A should be B, B may not be A, neither A nor B
4) 4 Mu/ Four Mode - What is A and B, what is A may not be B, what is B may not be A, neither A nor B
Two Types of Phenomena
1) Positive Phenomena - mind cognizes without explicitly negating another object
2) Negative Phenomena
A) Affirming Negative - mind cognizes while explicitly negating a phenomenon
B) Non-affirming negative - mind cognizes a phenomenon that doesn’t affirm an positive or affirming negative phenomenon
4 Pervasion Statements
1) If it is A, being B pervades
2) If it is B, being A pervades
3) If it is A, not being B pervades
4) If it is not A, being B pervades
Define “Reason Not Established “
The subject is not the reason
Define “No Pervasion”
The reason is not the predicate
8 Doors of Pervasion
1) If it is A, it is B
2) If it is B, it is A
3) If it is not A, it is not B
4) If it is not B, it is not A
5) If it has A, it has B
6) If it has B, it has A
7) If it doesn’t have A, it doesn’t have B
8) If it doesn’t have B, it doesn’t have A