(12steps total) PrintForm Definitions LogicSupplement Sections DiscrMathExt Doc
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At: negnegelim vs bivalence 2 1

1. P:Prop. P  P
2. P : Prop
3. P
4. P  P
  P


By: Analyze-1


Generated subgoals:

1 4. P
  P

Hypothesis
2 4. P
  P

Contradiction

About:
proporall
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(12steps total) PrintForm Definitions LogicSupplement Sections DiscrMathExt Doc