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Theorem ex-or 9893
Description: Example for ax-io 630. 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 2040 . 2  |-  4  =  4
21olci 651 1  |-  ( 2  =  3  \/  4  =  4 )
Colors of variables: wff set class
Syntax hints:    \/ wo 629    = wceq 1243   2c2 7964   3c3 7965   4c4 7966
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-gen 1338  ax-ext 2022
This theorem depends on definitions:  df-bi 110  df-cleq 2033
This theorem is referenced by: (None)
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