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Step * of Lemma hd?_wf

∀[T:Type]. ∀[L:T List].  (hd?(L) ∈ T?)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[L:T  List].    (hd?(L)  \mmember{}  T?)


By

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Latex:
ProveWfLemma

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