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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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2024-08-03
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