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Step * of Lemma es-until_wf

∀[es:EO]. ∀[P,Q:E ─→ ℙ].  ((P ∪ Q) ∈ E ─→ ℙ)
BY
{ ProveWfLemma⋅ }

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Latex:


\mforall{}[es:EO].  \mforall{}[P,Q:E  {}\mrightarrow{}  \mBbbP{}].    ((P  \mcup{}  Q)  \mmember{}  E  {}\mrightarrow{}  \mBbbP{})


By

ProveWfLemma\mcdot{}

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