Theorem ex-or 30407

Description: Example for df-or 848. 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 2736	. 2 ⊢ 4 = 4
2	1	olci 866	1 ⊢ (2 = 3 ∨ 4 = 4)

Syntax hints:   ∨ wo 847   = wceq 1540  2c2 12300  3c3 12301  4c4 12302

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-9 2119  ax-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-ex 1780  df-cleq 2728

This theorem is referenced by: (None)