Instance andp_imp_CCC: forall A {ND : NatDed A}, CCCviaNatDed A andp imp.
Instance sepcon_wand_CCC: forall A {ND : NatDed A} {SL: SepLog A}, CCCviaNatDed A sepcon wand.

Lemma prop_derives {A}{ND: NatDed A}:
forall (P Q: Prop), (P -> Q) -> prop P |-- prop Q.