⊤ Set option: lean::pp::notation and true false Assumed: a Error (line: 7, pos: 0) invalid object declaration, environment already has an object named 'a' Assumed: b and a b Assumed: A Error (line: 11, pos: 11) type mismatch at application argument 2 of and a A expected type Bool given type [36mType[0m [34mVariable[0m A : [36mType[0m ⟨lean::pp::notation ↦ false⟩ Error (line: 14, pos: 4) unknown option 'lean::p::notation', type 'Help Options.' for list of available options Error (line: 15, pos: 23) invalid option value, given option is not an integer Set option: lean::pp::notation a ∧ b