Theorem ex-or 30508

Description: Example for df-or 849. 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 2737	. 2 ⊢ 4 = 4
2	1	olci 867	1 ⊢ (2 = 3 ∨ 4 = 4)

Syntax hints:   ∨ wo 848   = wceq 1542  2c2 12212  3c3 12213  4c4 12214

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 1912  ax-6 1969  ax-7 2010  ax-9 2124  ax-ext 2709

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-ex 1782  df-cleq 2729

This theorem is referenced by: (None)