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Step * of Lemma l_member!_wf

∀[T:Type]. ∀[l:T List]. ∀[x:T].  ((x ∈! l) ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[l:T  List].  \mforall{}[x:T].    ((x  \mmember{}!  l)  \mmember{}  \mBbbP{})


By

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Latex:
ProveWfLemma

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