At: formula and left falsifiable concl,M,N:Formula List, q,r:Formula, a:Assignment.
a | < [q; r/ M @ N],concl > a | < M @ (qr.N),concl > By: UnivCD Generated subgoal:
1. concl: Formula List 2. M: Formula List 3. N: Formula List 4. q: Formula 5. r: Formula 6. a: Assignment a | < [q; r/ M @ N],concl > a | < M @ (qr.N),concl >