A machine the size of a star, fed by a Dyson sphere nested within its core. You type it a sentence.

It responds with one word: True, False, or Neither. "Neither" means your sentence holds no truth value—like a greeting or a question.

It knows everything: what has happened, what is happening, and what will happen.

Type your sentence, type your statement, not a question, and it will either affirm or deny it.