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ChopImpDf

⊢ f ⌢ g ⊃ f ChopImpDf

Proof:

1
g ⊃ true
Prop
2
f ⌢ g ⊃ f ⌢ true
1,RightChopImpChop
3
f ⌢ g ⊃ f
2, def. of 

qed

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2024-08-03
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