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Theorem ex-or 27408
Description: Example for df-or 384. 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 2651 . 2 4 = 4
21olci 405 1 (2 = 3 ∨ 4 = 4)
Colors of variables: wff setvar class
Syntax hints:  wo 382   = wceq 1523  2c2 11108  3c3 11109  4c4 11110
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-9 2039  ax-ext 2631
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-ex 1745  df-cleq 2644
This theorem is referenced by: (None)
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