Module KL0 := knot_full_variant.KnotLemmas_MixVariantHeredTOthRel(K0).
Existing Instance K0.ageable_knot.
Definition ag_knot_other := ag_prod K0.knot KI.other K0.ageable_knot.
Existing Instance ag_knot_other.

Lemma hered_hereditary : forall (p: K0.knot*KI.other -> Prop),
K0.hered p <-> hereditary age p.