Theorem ex-or 26670

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

Step	Hyp	Ref	Expression
1		eqid 2610	. 2 ⊢ 4 = 4
2	1	olci 405	1 ⊢ (2 = 3 ∨ 4 = 4)

Syntax hints:   ∨ wo 382   = wceq 1475  2c2 10947  3c3 10948  4c4 10949

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-ext 2590

This theorem depends on definitions:  df-bi 196  df-or 384  df-cleq 2603

This theorem is referenced by: (None)