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Step * of Lemma has-value-bnot-type

∀[a:Base]. a ∈ Top + Top supposing (¬ba)↓
BY
{ (Auto THEN RepUR ``bnot ifthenelse`` (-1) THEN HasValueD (-1) THEN Auto) }

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Latex:

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Latex:
\mforall{}[a:Base].  a  \mmember{}  Top  +  Top  supposing  (\mneg{}\msubb{}a)\mdownarrow{}


By

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Latex:
(Auto  THEN  RepUR  ``bnot  ifthenelse``  (-1)  THEN  HasValueD  (-1)  THEN  Auto)

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