(12steps total) PrintForm Definitions LogicSupplement Sections DiscrMathExt Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: negnegelim vs bivalence 2
1. P:Prop. P  P
2. P : Prop
3. P
  P
By: Witness1: P

Generated subgoal:

1 4. P  P
  P
3 steps

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

(12steps total) PrintForm Definitions LogicSupplement Sections DiscrMathExt Doc