Theorem pm2.07 385

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 373	1 |- (ph -> (ph \/ ph))

This proof depends on syntax axioms:   -> wi 4   \/ wo 357

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This proof depends on definitions:  df-bi 177  df-or 359

This theorem is used by:  oridm  500