#   Set: pp::colors
  Set: pp::unicode
Proof state:
a : Bool, b : Bool ⊢ a ⇒ b ⇒ a ∧ b
## Error (line: 6, pos: 0) executing external script ([string "return  imp_tac2() "]:1), attempt to call global 'imp_tac2' (a nil value)
## Error (line: 9, pos: 5) failed to prove theorem, proof has been aborted
Proof state:
H::1 : b, H : a, a : Bool, b : Bool ⊢ a ∧ b
#   Assumed: a
  Assumed: b
# Variable a : Bool
Variable b : Bool
#