Tractatus logico-philosophicus

A philosophical work by Ludwig Wittgenstein

4.463

The truth-conditions determine the range, which is left to the facts by the proposition. (The proposition, the picture, the model, are in a negative sense like a solid body, which restricts the free movement of another: in a positive sense, like the space limited by solid substance, in which a body may be placed.) Tautology leaves to reality the whole infinite logical space; contradiction fills the whole logical space and leaves no point to reality. Neither of them, therefore, can in any way determine reality.


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