Theorem pm2.07

Description: Theorem *2.07 of WhiteheadRussell p. 101. (Contributed by NM, 3-Jan-2005)

	Ref	Expression
Assertion	pm2.07	⊢ ( 𝜑 → ( 𝜑 ∨ 𝜑 ) )

Proof

Step	Hyp	Ref	Expression
1		olc	⊢ ( 𝜑 → ( 𝜑 ∨ 𝜑 ) )