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Theorem lbi1 89
Description: Extract forward implication from biconditional. Alternate form of lb1i 59.
Hypothesis
Ref Expression
lbi1.1 (𝜑𝜓)
Assertion
Ref Expression
lbi1 (𝜑𝜓)

Proof of Theorem lbi1
StepHypRef Expression
1 lbi1.1 . 2 (𝜑𝜓)
2 lbi1s 87 . 2 ((𝜑𝜓) ⊸ (𝜑𝜓))
31, 2lmp 76 1 (𝜑𝜓)
Colors of variables: wff var nilad
Syntax hints:  wlb 55  wli 61
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-eac1 33  ax-eac2 34
This theorem depends on definitions:  df-lb 56  df-li 62
This theorem is referenced by:  lbeui  99  md2  114  abs1  178
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