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ChopImpDi
⊢
f
;
g
⊃
f
ChopImpDi
Proof:
1
⊢
g
⊃
true
Prop
2
⊢
f
;
g
⊃
f
;
true
1
,
BoxChopImpChop
3
⊢
f
;
g
⊃
f
2
,
def. of
qed
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2024-08-03
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