Program Definition getYES (phi : rmap) := proj1_sig (make_rmap (getYES_aux phi) (ghost_of phi) (level phi) _ _).Program Definition getNO (phi : rmap) := proj1_sig (make_rmap (getNO_aux phi) (core (ghost_of phi)) (level phi) _ _).

Lemma getYES_getNO_join phi : join (getYES phi) (getNO phi) phi.