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Theorem ex-or 14857
Description: Example for ax-io 710. Example by David A. Wheeler. (Contributed by Mario Carneiro, 9-May-2015.)
Assertion
Ref Expression
ex-or (2 = 3 ∨ 4 = 4)

Proof of Theorem ex-or
StepHypRef Expression
1 eqid 2188 . 2 4 = 4
21olci 733 1 (2 = 3 ∨ 4 = 4)
Colors of variables: wff set class
Syntax hints:  wo 709   = wceq 1363  2c2 8987  3c3 8988  4c4 8989
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-gen 1459  ax-ext 2170
This theorem depends on definitions:  df-bi 117  df-cleq 2181
This theorem is referenced by: (None)
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