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ChopAndNotChopImp
⊢
f
;
g
∧¬
(
f
;
g
1
)
⊃
f
; (
g
∧¬
g
1
)
ChopAndNotChopImp
Proof:
1
⊢
g
⊃
(
g
∧¬
g
1
)
∨
g
1
Prop
2
⊢
f
;
g
⊃
f
; (
g
∧¬
g
1
)
∨
f
;
g
1
1
,
LeftChopImpChop
3
⊢
f
;
g
∧¬
(
f
;
g
1
)
⊃
f
; (
g
∧¬
g
1
)
2
,
Prop
qed
Here is a related theorem for the
yields
operator:
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2023-09-12
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