12 lines
176 B
Text
12 lines
176 B
Text
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.
|