Lemma DeMorgan_canonical_branch_join {SC: NormalSequentCalculus L Gamma} {AX: NormalAxiomatization L Gamma} {minAX: MinimunAxiomatization L Gamma} {ipGamma: IntuitionisticPropositionalLogic L Gamma} {dmpGamma: DeMorganPropositionalLogic L Gamma} (AL_DC: at_least derivable_closed cP) (AL_OW: at_least orp_witnessed cP) (AL_CONSI: at_least consistent cP) (LIN_CD: forall x, Lindenbaum_constructable (cannot_derive x) cP): BranchJoinKripkeIntuitionisticModel (Kworlds M).