Step
*
of Lemma
predicate_rev_implies_weakening
∀[T:Type]. ∀[P1,P2:T ⟶ ℙ].  (P1 
⇐⇒ P2 
⇒ P1 
⇐ P2)
BY
{ (RepUR ``predicate_equivalent predicate_implies predicate_rev_implies`` 0 THEN Auto) }
Latex:
Latex:
\mforall{}[T:Type].  \mforall{}[P1,P2:T  {}\mrightarrow{}  \mBbbP{}].    (P1  \mLeftarrow{}{}\mRightarrow{}  P2  {}\mRightarrow{}  P1  \mLeftarrow{}{}  P2)
By
Latex:
(RepUR  ``predicate\_equivalent  predicate\_implies  predicate\_rev\_implies``  0  THEN  Auto)
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