At: formula imp left sound1121111211 1. concl: Formula List 2. M: Formula List 3. N: Formula List 4. q: Formula 5. r: Formula 6. a: Assignment 7. a |= < M @ (qr.N),concl > 8. a |= < r.(M @ N),concl >
a |= < M @ N,q.concl > By: Sel 3
(FwdThru
Thm*concl,M,N:Formula List, q,r:Formula, a:Assignment.
a |= < r.(M @ N),concl > & a |= < M @ N,q.concl > a |= < M @ (qr.N),concl >
[-2]) Generated subgoal:
1
9. a |= < M @ N,q.concl > a |= < M @ N,q.concl >