(3steps total) PrintForm Definitions Lemmas core StandardLIB Doc
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At: dneg elim a 1

1. A : Prop
2. Dec(A)
3. A
  A


By: BackThru Thm* Dec(A A  A


Generated subgoals:

None

About:
decidablepropimplies
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

(3steps total) PrintForm Definitions Lemmas core StandardLIB Doc