Type Ctrl-D or 'Exit.' to exit or 'Help.' for help. # Set: pp::colors Set: pp::unicode Proof state: a : Bool, b : Bool ⊢ a ⇒ b ⇒ a ∧ b ## Proof state: H : a, a : Bool, b : Bool ⊢ b ⇒ a ∧ b ## Proof state: H::1 : b, H : a, a : Bool, b : Bool ⊢ a ∧ b ## Proof state: H::1 : b, H : a, a : Bool, b : Bool ⊢ a H::1 : b, H : a, a : Bool, b : Bool ⊢ b ## Proof state: no goals ## Proved: T1 #