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 later_derives {A}{ND: NatDed A}{IA: Indir A}:
forall P Q: A, P |-- Q -> later P |-- later Q.