Theorem falorfal 1339

Description: A \/ identity. (Contributed by Anthony Hart, 22-Oct-2010.) (Proof shortened by Andrew Salmon, 13-May-2011.)

Assertion

Ref	Expression
falorfal	|- ( ( F. \/ F. ) <-> F. )

Proof of Theorem falorfal

Step	Hyp	Ref	Expression
1		oridm 706	1 |- ( ( F. \/ F. ) <-> F. )

Syntax hints:   <-> wb 103   \/ wo 661   F. wfal 1289

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662

This theorem depends on definitions:  df-bi 115

This theorem is referenced by: (None)