Step
*
of Lemma
MMTree_Node?_wf
∀[T:Type]. ∀[v:MMTree(T)].  (MMTree_Node?(v) ∈ 𝔹)
BY
{ DepprodCoDatatypeRecognizerWf }
Latex:
\mforall{}[T:Type].  \mforall{}[v:MMTree(T)].    (MMTree\_Node?(v)  \mmember{}  \mBbbB{})
By
DepprodCoDatatypeRecognizerWf
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