Step
*
of Lemma
no-excluded-middle-quot-true1
¬(∀P:ℙ. ⇃(P ∨ (¬P)))
BY
{ ((D 0 THENA Auto)
THEN (Assert EquivRel(∀x:Base. ((x)↓ ∨ (¬(x)↓));f,g.∀x:Base. (↓True)) BY
(RepeatFor 2 (D 0) THEN Reduce 0 THEN Auto THEN D 0 THEN Reduce 0 THEN Auto))
THEN ((InstLemma not-has-value-decidable-quot [⌜λ2f g.∀x:Base. (↓True)⌝]⋅ THENA Complete (Auto)) THENA Auto)) }
1
1. ∀P:ℙ. ⇃(P ∨ (¬P))
2. EquivRel(∀x:Base. ((x)↓ ∨ (¬(x)↓));f,g.∀x:Base. (↓True))
3. ¬(f,g:∀x:Base. ((x)↓ ∨ (¬(x)↓))//(∀x:Base. (↓True)))
⊢ False
Latex:
Latex:
\mneg{}(\mforall{}P:\mBbbP{}. \00D9(P \mvee{} (\mneg{}P)))
By
Latex:
((D 0 THENA Auto)
THEN (Assert EquivRel(\mforall{}x:Base. ((x)\mdownarrow{} \mvee{} (\mneg{}(x)\mdownarrow{}));f,g.\mforall{}x:Base. (\mdownarrow{}True)) BY
(RepeatFor 2 (D 0) THEN Reduce 0 THEN Auto THEN D 0 THEN Reduce 0 THEN Auto))
THEN ((InstLemma not-has-value-decidable-quot [\mkleeneopen{}\mlambda{}\msubtwo{}f g.\mforall{}x:Base. (\mdownarrow{}True)\mkleeneclose{}]\mcdot{} THENA Complete (Auto))
THENA Auto
))
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