Wittg.–

       It is easy to suppose that “individual”, “particular”, “complex” etc. are primitive ideas of logic. Russell e.g. says “individual” & “matrix” are “primitive ideas”. This error presumably is to be explained by the fact that, by employment of variables instead of ˇthe generality-signs, it comes to seem as if logic dealt with things which have been deprived of all properties except thing-hood, & with propositions deprived of all properties except complexity. We forget that the indefinables of symbols [Urbilder von Zeichen] only occur under the generality-sign, never outside it.