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Step * of Lemma predicate_equivalent_inversion

∀[T:Type]. ∀[P1,P2:T ⟶ ℙ].  (P1 ⇐⇒ P2 ⇒ P2 ⇐⇒ P1)
BY
{ (Unfolds ``predicate_equivalent`` 0 THEN Auto)⋅ }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[P1,P2:T  {}\mrightarrow{}  \mBbbP{}].    (P1  \mLeftarrow{}{}\mRightarrow{}  P2  {}\mRightarrow{}  P2  \mLeftarrow{}{}\mRightarrow{}  P1)


By

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Latex:
(Unfolds  ``predicate\_equivalent``  0  THEN  Auto)\mcdot{}

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