Set: pp::colors
  Set: pp::unicode
λ x y : Bool, x ∧ y
let x := ⊤,
    y := ⊤,
    z := x ∧ y,
    f := λ arg1 arg2 : Bool, arg1 ∧ arg2 = arg2 ∧ arg1 = arg1 ∨ arg2 ∨ arg2
in f x y ∨ z
(⊤ ∧ ⊤ = ⊤ ∧ ⊤ = ⊤ ∨ ⊤ ∨ ⊤) ∨ ⊤ ∧ ⊤