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Theorem lbsym 127
Description: Linear biconditional is symmetric.
Assertion
Ref Expression
lbsym ((𝜑𝜓) ⊸ (𝜓𝜑))

Proof of Theorem lbsym
StepHypRef Expression
Colors of variables: wff var nilad
Syntax hints:  wlb 55  wli 61
 WARNING: This theorem has an incomplete proof.
This theorem is referenced by: (None)
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