Theorem 1elpr01

Description: 1 is an element of { 0 , 1 } . (Contributed by Umit Teoman Dogan, 10-Jun-2026)

	Ref	Expression
Assertion	1elpr01	$$⊢1\in \left\{0,1\right\}$$

Proof

Step	Hyp	Ref	Expression
1		1ex	$$⊢1\in \mathrm{V}$$
2	1	prid2	$$⊢1\in \left\{0,1\right\}$$