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added Variant theorem flavour
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3 (*      ||M||                                                             *)
4 (*      ||A||       A project by Andrea Asperti                           *)
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11 (*        v         GNU General Public License Version 2                  *)
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14
15 set "baseuri" "cic:/matita/tests/clearbody".
16 alias num (instance 0) = "natural number".
17 alias symbol "eq" (instance 0) = "leibnitz's equality".
18 alias symbol "plus" (instance 0) = "natural plus".
19
20
21 theorem stupid : 
22   let x \def 0 + 1 in x + 1= x + 1.
23   intros.
24   clearbody x. 
25   simplify.
26   generalize in \vdash (? ? (? % ?) (? % ?)).
27   intros.
28   reflexivity.
29   qed.
30