Lemma stnneq {n : nat} : neqReln (⟦n⟧). Proof. intros i j. exists (i ≠ j)%nat. split. - apply propproperty. - apply stn_ne_iff_neq. Defined.
Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.DecidablePropositions. Require Import UniMath.MoreFoundations.NegativePropositions.