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ChopImpDiamond

⊢ f ; g ⊃ g ChopImpDiamond

Proof:

1
⊢ f ⊃true
Prop
2
⊢ f ; g ⊃true ; g
1,LeftChopImpChop
3
⊢ f ; g ⊃ g
2, def. of 

qed

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2023-09-12
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