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Step * of Lemma dl-valid_wf

∀[phi:Prop]. (|= phi ∈ ℙ')
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[phi:Prop].  (|=  phi  \mmember{}  \mBbbP{}')


By

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Latex:
ProveWfLemma

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