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

Generated subgoals:

1   P
2 steps
2   P
2 steps

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

(12steps total) PrintForm Definitions LogicSupplement Sections DiscrMathExt Doc