Theorem 1p1e2

Description: 1 + 1 = 2. (Contributed by NM, 1-Apr-2008)

	Ref	Expression
Assertion	1p1e2	|- ( 1 + 1 ) = 2

Proof

Step	Hyp	Ref	Expression
1		df-2	|- 2 = ( 1 + 1 )
2	1	eqcomi	|- ( 1 + 1 ) = 2