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Step * of Lemma or_wf

∀[A,B:ℙ].  (A ∨ B ∈ ℙ)
BY
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Latex:

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Latex:
\mforall{}[A,B:\mBbbP{}].    (A  \mvee{}  B  \mmember{}  \mBbbP{})


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Latex:
Auto

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