This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.

Metamath Proof Explorer

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 ⊤