Theorem ex-or

Description: Example for df-or . Example by David A. Wheeler. (Contributed by Mario Carneiro, 9-May-2015)

	Ref	Expression
Assertion	ex-or	$$⊢\left(2=3\vee 4=4\right)$$

Proof

Step	Hyp	Ref	Expression
1		eqid	$$⊢4=4$$
2	1	olci	$$⊢\left(2=3\vee 4=4\right)$$