Theorem ex-or 29539

Description: Example for df-or 846. 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

Step	Hyp	Ref	Expression
1		eqid 2731	. 2 ⊢ 4 = 4
2	1	olci 864	1 ⊢ (2 = 3 ∨ 4 = 4)

Syntax hints:   ∨ wo 845   = wceq 1541  2c2 12249  3c3 12250  4c4 12251

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-9 2116  ax-ext 2702

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-ex 1782  df-cleq 2723

This theorem is referenced by: (None)