Level: Lib Thy Top:
Hypotheses:

None

Conclusion:

F:Formula. subformula(F) Formula List

Applied Tactic: Unfold `subformula` 0 THEN Auto
Generated subgoals:

1. case F:x [];p (p::[]);pq (p::q::[]);pq (p::q::[]);pq (p::q::[]); Formula List