(12steps total) PrintForm Definitions LogicSupplement Sections DiscrMathExt Doc
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At: negnegelim vs bivalence 1 1
1. P:Prop. P  P
2. P : Prop
  (P  P)
By: Analyze

Generated subgoal:

1 3. (P  P)
  False
5 steps

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

(12steps total) PrintForm Definitions LogicSupplement Sections DiscrMathExt Doc