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Step * of Lemma isinl-bool-if-has-value

∀[t:Base]. isinl(t) ∈ 𝔹 supposing (t)↓
BY
{ CanonicalAuto }

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Latex:

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Latex:
\mforall{}[t:Base].  isinl(t)  \mmember{}  \mBbbB{}  supposing  (t)\mdownarrow{}


By

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Latex:
CanonicalAuto

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