Step
*
of Lemma
strictness-decide
∀[F,G:Top].  (case ⊥ of inl(x) => F[x] | inr(x) => G[x] ~ ⊥)
BY
{ (SqReasoning THEN Assert ⌜(⊥)↓⌝⋅ THEN BotDiv THEN ProveHasValue) }
Latex:
Latex:
\mforall{}[F,G:Top].    (case  \mbot{}  of  inl(x)  =>  F[x]  |  inr(x)  =>  G[x]  \msim{}  \mbot{})
By
Latex:
(SqReasoning  THEN  Assert  \mkleeneopen{}(\mbot{})\mdownarrow{}\mkleeneclose{}\mcdot{}  THEN  BotDiv  THEN  ProveHasValue)
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