proposition: Lemma demo_hide_hyps : forall x:nat, x + 0 = x.
proof: Proof. Proof using. intros. generalize (lemma_hide : Something). intros H. generalize (lemma_hide : Something). intros H'. show_hyp H. hide_hyp H. show_hyps. hide_hyps. hnf in H. apply H'. Qed.
imports: TLC(LibTactics) Coq.micromega.Lia