helm/matita/tests/contradiction.ma

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  14
  15 set "baseuri" "cic:/matita/tests/contradiction".
  16 alias id "True" = "cic:/Coq/Init/Logic/True.ind#xpointer(1/1)".
  17 alias id "not" = "cic:/Coq/Init/Logic/not.con".
  18 alias num (instance 0) = "natural number".
  19 alias symbol "eq" (instance 0) = "leibnitz's equality".
  20
  21
  22
  23 theorem stupid: \forall a:Prop. a \to not a \to 0 = 2.
  24 intros.
  25 letin H \def (H1 H).
  26 contradiction.
  27 qed.
  28
  29
  30