(** Testing over for the 1-var case *)
intros.
evar (I : Type); evar (R : Type); evar (x2 : I -> R).
assert (H : forall i : nat, i + 2 * i - i = x2 i).
intros i.
unfold x2 in *; clear x2;
unfold R in *; clear R;
unfold I in *; clear I.
apply Under_eq_from_eq.
Fail done.
over.
myadmit.
Qed.

Lemma test_over_1_2 : False.