matita/tests/decompose.ma

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  14
  15 set "baseuri" "cic:/matita/tests/decompose".
  16 include "legacy/coq.ma".
  17 alias symbol "and" (instance 0) = "Coq's logical and".
  18 alias symbol "or" (instance 0) = "Coq's logical or".
  19
  20
  21
  22 theorem stupid:
  23   \forall a,b,c:Prop.
  24   (a \land c \lor b \land c) \to (c \land (b \lor a)).
  25   intros.decompose H.split.assumption.right.assumption.
  26   split.assumption.left.assumption.qed.
  27
  28