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Step * of Lemma decidable__iff

∀[P,Q:ℙ].  (Dec(P) ⇒ Dec(Q) ⇒ Dec(P ⇐⇒ Q))
BY
{ (Repeat (Unfolds ``iff rev_implies`` 0) THEN Auto) }

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Latex:

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


By

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Latex:
(Repeat  (Unfolds  ``iff  rev\_implies``  0)  THEN  Auto)

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