#   Set: pp::colors
  Set: pp::unicode
Proof state:
A : Bool, B : Bool, assumption : A ∧ B ⊢ A
## Proof state:
no goals
## Proof state:
A : Bool, B : Bool, assumption : A ∧ B, lemma1 : A ⊢ B
## Proof state:
no goals
## Proof state:
A : Bool, B : Bool, assumption : A ∧ B, lemma1 : A, lemma2 : B ⊢ B ∧ A
## Proof state:
no goals
##   Proved: T2
#