(13steps total) PrintForm Definitions Lemmas LogicSupplement Sections DiscrMathExt Doc
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At: decidable cand 1 2 1 1

1. P : Prop
2. Q : Prop(given P)
3. P
4. P  Dec(Q)
5. P & Q
  P


By: Analyze-1


Generated subgoals:

None

About:
isectpropimplies
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(13steps total) PrintForm Definitions Lemmas LogicSupplement Sections DiscrMathExt Doc