HOME TOP UP PREV NEXT 1 2 3 4 5 6 GERMAN MAP Tractatus Logico-Philosophicus 5.52
Frege and Russell have introduced generality in connexion with the logical product of the logical sum. Then it would be difficult to understand the propositions "(x) . fx" and "(x) . fx" in which both ideas lie concealed.
If the elementary propositions are given, then therewith all elementary propositions are also given.
Certainty, possibility or impossibility of a state of affairs are not expressed by a proposition but by the fact that an expression is a tautology, a significant proposition or a contradiction.
That precedent to which one would always appeal, must be present in the symbol itself.
In order then to arrive at the customary way of expression we need simply say after an expression "there is only and only one x, which . . . .": and this x is a.