Theorem altru

Description: For all sets, T. is true. (Contributed by Anthony Hart, 13-Sep-2011)

	Ref	Expression
Assertion	altru	⊢ ∀ 𝑥 ⊤

Proof

Step	Hyp	Ref	Expression
1		tru	⊢ ⊤
2	1	ax-gen	⊢ ∀ 𝑥 ⊤