lean2/tests/lean/interactive/t1.lean

Theorem T2 (a b : Bool) : a => b => a /\ b.
done.
done.
(** imp_tac() **).
imp_tac2.
foo.
(** imp_tac() **).
(** imp_tac() **).
(** conj_tac() **).
back.
(** assumption_tac() **).
done.