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Theorem com4t 79
Description: Commutation of antecedents. Rotate twice. (Contributed by NM, 25-Apr-1994.)
Hypothesis
Ref Expression
com4.1 (φ → (ψ → (χ → (θτ))))
Assertion
Ref Expression
com4t (χ → (θ → (φ → (ψτ))))

Proof of Theorem com4t
StepHypRef Expression
1 com4.1 . . 3 (φ → (ψ → (χ → (θτ))))
21com4l 78 . 2 (ψ → (χ → (θ → (φτ))))
32com4l 78 1 (χ → (θ → (φ → (ψτ))))
Colors of variables: wff set class
Syntax hints:  wi 4
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7
This theorem is referenced by:  com4r  80  com24  81  mopick  1960  tfri3  5875
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