Tautology

The Viennese logicians worked out a system wherein everything is, as far as I understood it, a tautology, that is a repetition of premises. In mathematics, it goes from a very simple theorem to a very complicated one, but it's all in the first theorem. So, metaphysics: tautology; religion: tautology: everything is tautology, except black coffee because the senses are in control! The eyes see the black coffee, the senses are in control, it's the truth; but the rest is always tautology.