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Theorem pm2.07 711
Description: Theorem *2.07 of [WhiteheadRussell] p. 101. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm2.07 (𝜑 → (𝜑𝜑))

Proof of Theorem pm2.07
StepHypRef Expression
1 olc 685 1 (𝜑 → (𝜑𝜑))
Colors of variables: wff set class
Syntax hints:  wi 4  wo 682
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-io 683
This theorem depends on definitions:  df-bi 116
This theorem is referenced by:  oridm  731
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