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Theorem pm2.07 689
Description: Theorem *2.07 of [WhiteheadRussell] p. 101. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm2.07  |-  ( ph  ->  ( ph  \/  ph ) )

Proof of Theorem pm2.07
StepHypRef Expression
1 olc 665 1  |-  ( ph  ->  ( ph  \/  ph ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    \/ wo 662
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-io 663
This theorem depends on definitions:  df-bi 115
This theorem is referenced by:  oridm  707
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