Set: pp::colors
  Set: pp::unicode
and_truer : ∀ a : Bool, a ∧ ⊤ ↔ a
and_assoc : ∀ a b c : Bool, (a ∧ b) ∧ c ↔ a ∧ b ∧ c
new scope
or_assoc : ∀ a b c : Bool, (a ∨ b) ∨ c ↔ a ∨ b ∨ c
and_truer : ∀ a : Bool, a ∧ ⊤ ↔ a
and_assoc [disabled] : ∀ a b c : Bool, (a ∧ b) ∧ c ↔ a ∧ b ∧ c
after end of scope
and_truer : ∀ a : Bool, a ∧ ⊤ ↔ a
and_assoc : ∀ a b c : Bool, (a ∧ b) ∧ c ↔ a ∧ b ∧ c