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Step * of Lemma bool-to-neg-dcdr-aux

∀[A:Type]. ∀f:A ⟶ 𝔹. ∀x:A.  Dec(f x = ff)
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Latex:

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Latex:
\mforall{}[A:Type].  \mforall{}f:A  {}\mrightarrow{}  \mBbbB{}.  \mforall{}x:A.    Dec(f  x  =  ff)


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Latex:
Auto

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