Step
*
of Lemma
RankEx2_LeafT?_wf
∀[S,T:Type]. ∀[v:RankEx2(S;T)].  (RankEx2_LeafT?(v) ∈ 𝔹)
BY
{ DepprodCoDatatypeRecognizerWf }
Latex:
\mforall{}[S,T:Type].  \mforall{}[v:RankEx2(S;T)].    (RankEx2\_LeafT?(v)  \mmember{}  \mBbbB{})
By
DepprodCoDatatypeRecognizerWf
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