Theorem truorfal

Description: A \/ identity. (Contributed by Anthony Hart, 22-Oct-2010)

	Ref	Expression
Assertion	truorfal	⊢ ( ( ⊤ ∨ ⊥ ) ↔ ⊤ )

Proof

Step	Hyp	Ref	Expression
1		tru	⊢ ⊤
2	1	orci	⊢ ( ⊤ ∨ ⊥ )
3	2	bitru	⊢ ( ( ⊤ ∨ ⊥ ) ↔ ⊤ )