A zero-knowledge proof is an interactive method for one party to prove to another that a mathematical statement is true without revealing anything other than the veracity of the statement.

because zero eats other numbers

Knowledge gained without proof, by a direct contemplation of truth, (Marxism)

My knowledge about thermal expansion borders on absolute zero.

Georges Dicker has written:

'Perceptual knowledge' -- subject- s -: Knowledge, Theory of, Perception - Philosophy -, Theory of Knowledge

'Descartes' -- subject- s -: First philosophy, God, Knowledge, Theory of, Methodology, Ontological Proof, Proof, Ontological, Theory of Knowledge

'Berkeley's idealism' -- subject- s -: Idealism, Idea - Philosophy -, Metaphysics