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1 (* test _with_ the WHD on the apply argument *)
2
3 alias id "not" = "cic:/Coq/Init/Logic/not.con".
4 alias id "False" = "cic:/Coq/Init/Logic/False.ind#xpointer(1/1)".
5
6 theorem b:
7   \forall x:Prop.
8   (not x) \to x \to False.
9 intros.
10 apply H.
11 assumption.
12 qed.
13
14 (* test _without_ the WHD on the apply argument *)
15
16 alias symbol "eq" (instance 0) = "leibnitz's equality".
17
18 theorem a:
19   \forall A:Set.
20   \forall x,y : A.
21   not (x=y) \to not (x=y).
22 intros.
23 apply H.
24 qed.