x : Nat
⊢ id (twice (id x))
x : Nat
⊢ id x
x : Nat
⊢ x
x : Nat
⊢ id (twice x)
y : Nat
⊢ (fun x => x + y = 0) = fun x => False
y : Nat
⊢ fun x => x + y = 0
y x : Nat
⊢ y + x = 0
y : Nat
⊢ (fun x => y + x = 0) = fun x => False
y : Nat
⊢ (fun x => y + x = 0) = fun x => False
convInConv.lean:25:2-25:7: warning: declaration uses 'sorry'