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Theorem mccob 116
Description: is commutative. Biconditional version of mcco 115.
Assertion
Ref Expression
mccob ((𝜑𝜓) ⧟ (𝜓𝜑))

Proof of Theorem mccob
StepHypRef Expression
1 mcco 115 . 2 ((𝜑𝜓) ⊸ (𝜓𝜑))
2 mcco 115 . 2 ((𝜓𝜑) ⊸ (𝜑𝜓))
31, 2ilb 96 1 ((𝜑𝜓) ⧟ (𝜓𝜑))
Colors of variables: wff var nilad
Syntax hints:  wlb 55  wmc 105
This theorem was proved from axioms:  ax-ibot 4  ax-ebot 5  ax-cut 6  ax-init 7  ax-mdco 8  ax-mdas 9  ax-iac 32  ax-eac1 33  ax-eac2 34
This theorem depends on definitions:  df-lb 56  df-li 62  df-mc 106
This theorem is referenced by: (None)
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