Module SPredLems := SPredLemmas VSM. Import SPredLems.

Lemma clausify_pureneg : forall l : list pure_atom,
list_denote (neg oo pure_atom_denote) (@andp state) TT l =
list_denote clause_denote (@andp state) TT
(map (fun a => mkPureClause (order_eqv_pure_atom a::nil) nil) l).