Theorem pm4.62 419

Description: Theorem *4.62 of [WhiteheadRussell] p. 120. (Contributed by NM, 3-Jan-2005.)

Assertion

Ref	Expression
pm4.62

Proof of Theorem pm4.62

Step	Hyp	Ref	Expression
1		imor 412	1

Syntax hints:  -.wn 3  ->wi 4  <->wb 184  \/wo 368

This theorem is referenced by:  ianor  488  rb-bijust  1582  frxp  6910  bnj1174  34059  cdleme0nex  36015

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 185  df-or 370