Lemma (logic)
In informal logic and argument mapping, a lemma is simultaneously a contention for premises below it and a premise for a contention above it. Transitivity: If one has proof that B follows from A and proof of A, then one has proof of B.
In informal logic and argument mapping, a lemma is simultaneously a contention for premises below it and a premise for a contention above it. Transitivity: If one has proof that B follows from A and proof of A, then one has proof of B.