fact: Variable EDCT : RelDec_Correct EDT.
imports: Coq.Relations.Relation_Definitions Coq.Classes.RelationClasses Coq.Classes.Morphisms ExtLib.Core.RelDec ExtLib.Structures.Reducible ExtLib.Structures.Traversable ExtLib.Structures.Applicative ExtLib.Structures.Functor ExtLib.Structures.FunctorLaws ExtLib.Data.Fun ExtLib.Tactics.Injection ExtLib.Tactics.Consider