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Theorem ex-or 29407
Description: Example for df-or 847. 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 2737 . 2 4 = 4
21olci 865 1 (2 = 3 ∨ 4 = 4)
Colors of variables: wff setvar class
Syntax hints:  wo 846   = wceq 1542  2c2 12215  3c3 12216  4c4 12217
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-9 2117  ax-ext 2708
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-ex 1783  df-cleq 2729
This theorem is referenced by: (None)
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