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Step * of Lemma dl-box?_wf

∀[x:Prop]. (dl-box?(x) ∈ 𝔹)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[x:Prop].  (dl-box?(x)  \mmember{}  \mBbbB{})


By

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Latex:
ProveWfLemma

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