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+Require Coq.Classes.RelationClasses.
+
+Class PreOrder (A : Type) (r : A -> A -> Type) : Type :=
+{ refl : forall x, r x x }.
+
+(* FAILURE 1 *)
+
+Section foo.
+  Polymorphic Universes A.
+  Polymorphic Context {A : Type@{A}} {rA : A -> A -> Prop} {PO : PreOrder A rA}.
+
+  Fail Definition foo := PO.
+End foo.
+
+
+Module ILogic.
+
+Set Universe Polymorphism.
+
+(* Logical connectives *)
+Class ILogic@{L} (A : Type@{L}) : Type := mkILogic
+{
+  lentails: A -> A -> Prop;
+  lentailsPre:> RelationClasses.PreOrder lentails
+}.
+
+
+End ILogic.
+
+Set Printing Universes.
+
+(* There is stil a problem if the class is universe polymorphic *)
+Section Embed_ILogic_Pre.
+  Polymorphic Universes A T.
+  Fail Context {A : Type@{A}} {ILA: ILogic.ILogic@{A} A}.
+
+End Embed_ILogic_Pre.
+\ No newline at end of file