fact: Definition finType_eqb {X:finType} (x y : X) := Nat.eqb (index x) (index y).
imports: Undecidability.L.Tactics(LTactics GenEncode) Undecidability.L(Datatypes.LNat Functions.EqBool) Undecidability.Shared.Libs.PSL.FiniteTypes.FinTypes