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Step * of Lemma decidable__and

∀[P,Q:ℙ].  (Dec(P) ⇒ (P ⇒ Dec(Q)) ⇒ Dec(P ∧ Q))
BY
{ ((Unfold `decidable` 0) THEN Auto THEN RepeatFor 2 ((SplitOrHyps THEN Auto))) }

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Latex:

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Latex:
\mforall{}[P,Q:\mBbbP{}].    (Dec(P)  {}\mRightarrow{}  (P  {}\mRightarrow{}  Dec(Q))  {}\mRightarrow{}  Dec(P  \mwedge{}  Q))


By

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Latex:
((Unfold  `decidable`  0)  THEN  Auto  THEN  RepeatFor  2  ((SplitOrHyps  THEN  Auto)))

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