fact: Variable (X : Type) (H1 : finite_t X) (H2 : discrete X) (K : (X -> bool) -> Prop) (HK : forall P Q, (forall x, P x = Q x) -> K P <-> K Q) (Dec : forall P, decidable (K P)).
imports: List Arith Bool Eqdep_dec Undecidability.Synthetic.Definitions Undecidability.Synthetic.ReducibilityFacts Undecidability.Synthetic.InformativeDefinitions Undecidability.Synthetic.InformativeReducibilityFacts Undecidability.Shared.Libs.DLW.Utils(utils_tac utils_list utils_nat finite) Undecidability.Shared.Libs.DLW.Vec(pos vec) Undecidability.FOL.TRAKHTENBROT(notations utils fol_ops)