intros; assumption.
Qed.
(*************************************************************************)

Lemma nax :
forall (goal : Int) (work : nf_list) (ds : disjs)
(ni : nested_imps) (ai : atomic_imps) (a : atoms)
(context : flist),
in_ngamma work ds ni ai a (NAtom goal) ->
nsearch_spec goal work ds ni ai a context.