The predicate is what is affirmed or denied of the subject.
Example 1: Zayd can write.
Example 2: Zayd cannot swim.
These can both be true; writing and swimming are different attributes. Only when the very same predicate is both affirmed and denied, with the remaining circumstances fixed, is contradiction possible.
Opening interactive controls...
Identity of predicate
Contradiction and the Eight Conditions
The predicate is what is affirmed or denied of the subject.
Example 1: Zayd can write.
Example 2: Zayd cannot swim.
These can both be true; writing and swimming are different attributes. Only when the very same predicate is both affirmed and denied, with the remaining circumstances fixed, is contradiction possible.