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Step * 2 2 of Lemma dcdr-to-bool-equivalence


1. P : ℙ
2. y : ¬P@i
3. P@i
⊢ ↑[inr y ]b
BY
{ (Assert ⌜False⌝⋅ THEN ProveProp) }

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Latex:

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Latex:

1.  P  :  \mBbbP{}
2.  y  :  \mneg{}P@i
3.  P@i
\mvdash{}  \muparrow{}[inr  y  ]\msubb{}


By

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Latex:
(Assert  \mkleeneopen{}False\mkleeneclose{}\mcdot{}  THEN  ProveProp)

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