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StateImpBiGen
⊢
w
⊃
f
⇒ ⊢
w
⊃
f
StateImpBiGen
Proof:
1
⊢
w
⊃
f
given
2
⊢ ¬
f
⊃¬
w
1
,
Prop
3
⊢
¬
f
⊃
¬
w
2
,
DiImpDi
4
⊢
¬
w
≡¬
w
DiState
5
⊢
¬
f
⊃¬
w
3
,
4
,
Prop
6
⊢
w
⊃¬
¬
f
5
,
Prop
7
⊢
w
⊃
f
6
,
def. of
qed
Let us now consider the following valuable theorem:
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2024-08-03
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