Module SPredLems := SPredLemmas VSM. Import SPredLems.

Lemma clausify_succ : forall pnatoms (purepos pureneg : list pure_atom)
(space : list space_atom) (s : state)
(Hyp: mk_pureR pnatoms = (purepos, pureneg)),
(~assertion_denote (Assertion pnatoms space) s) =
(clause_denote (NegSpaceClause purepos space pureneg) s).