This remark provides the key to the problem, how much truth there is in solipsism. For what the solipsist… — Ludwig Wittgenstein
This remark provides the key to the problem, how much truth there is in solipsism. For what the solipsist means is quite correct; only it cannot be said, but makes itself manifest. The world is my world: this is manifest in the fact that the limits of language (of that language which alone I understand) mean the limits of my world.
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If I cannot say a priori what elementary propositions there are, then the attempt to do so must lead to obvious nonsense.
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.)
The world and life are one.

