fact: Definition elim_impossible_call {A} (a : A) {imp : ImpossibleCall a} (P : A -> Type) : P a := match is_impossible_call with end.
imports: Coq(Extraction CRelationClasses) Equations.Init Equations.CoreTactics Equations.Type.Logic Equations.Type.Relation Equations.Type.Relation_Properties Equations.Type.WellFounded