A tautology's truth is certain, a 's possible, a contradiction's impossible. (Certain, possible, impossible… — Ludwig Wittgenstein
A tautology's truth is certain, a 's possible, a contradiction's impossible. (Certain, possible, impossible: here we have the first indication of the scale that we need in the theory of probability.)
Die Wahrheit der Tautologie ist gewiss, des Satzes möglich, der Kontradiktion unmöglich.
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