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Step * 1 1 of Lemma in-bar-equal

.....antecedent..... 
1. [T] : Type
2. x : bar-base(T)
3. b : T
4. x↓b ⇒ in-bar(b)↓b
⊢ in-bar(b)↓b
BY
{ (With ⌜0⌝ (D 0)⋅ THEN Auto) }

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Latex:

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Latex:
.....antecedent..... 
1.  [T]  :  Type
2.  x  :  bar-base(T)
3.  b  :  T
4.  x\mdownarrow{}b  {}\mRightarrow{}  in-bar(b)\mdownarrow{}b
\mvdash{}  in-bar(b)\mdownarrow{}b


By

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Latex:
(With  \mkleeneopen{}0\mkleeneclose{}  (D  0)\mcdot{}  THEN  Auto)

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