At: formula or left sound111121 1. concl: Formula List 2. M: Formula List 3. N: Formula List 4. q: Formula 5. r: Formula 6. |= < q.(M @ N),concl > 7. a: Assignment 8. a |= < M @ (qr.N),concl >
a |= < r.(M @ N),concl > a | < r.(M @ N),concl > By: Sel 3
(FwdThru
Thm*concl,M,N:Formula List, q,r:Formula, a:Assignment.
a |= < q.(M @ N),concl > & a |= < r.(M @ N),concl > a |= < M @ (qr.N),concl >
[-1]) Generated subgoal: