fact: Variable A B : Type.
imports: Undecidability.Shared.Libs.PSL.FiniteTypes.FinTypes Undecidability.Shared.Libs.PSL.FiniteTypes.BasicFinTypes Undecidability.Shared.Libs.PSL.FiniteTypes.CompoundFinTypes Undecidability.Shared.Libs.PSL.FiniteTypes.VectorFin Undecidability.Shared.Libs.PSL.Vectors.FinNotation Undecidability.Shared.Libs.PSL.Inhabited Undecidability.Shared.Libs.PSL.Base Undecidability.Shared.Libs.PSL.Vectors.Vectors Lia