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Step * of Lemma and_wf

∀[A,B:ℙ].  (A ∧ B ∈ ℙ)
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Latex:

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


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Latex:
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