Theorem pm2.07 749

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

Step	Hyp	Ref	Expression
1		olc 723	1 |- ( ph -> ( ph \/ ph ) )

This proof depends on syntax axioms:   -> wi 4   \/ wo 720

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-io 721

This proof depends on definitions:  df-bi 117

This theorem is used by:  oridm  769