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Step * of Lemma decidable_decision

∀[P:ℙ]. ∀[x:Dec(P)].  (x ∈ Decision)
BY
{ ((Unfolds ``decidable decision`` 0 THEN Unfold `or` 0) THEN Auto) }

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Latex:

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Latex:
\mforall{}[P:\mBbbP{}].  \mforall{}[x:Dec(P)].    (x  \mmember{}  Decision)


By

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Latex:
((Unfolds  ``decidable  decision``  0  THEN  Unfold  `or`  0)  THEN  Auto)

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