4.0411
If we tried, for example, to express what is expressed by “(x).fx” by putting an index before fx, like: “Gen. fx”, it would not do, we should not know what was generalized. If we tried to show it by an index g, like: “f(xg)” it would not do—we should not know the scope of the generalization. If we were to try it by introducing a mark in the argument places, like “(G, G). F(G, G)”, it would not do—we could not determine the identity of the variables, etc. All these ways of symbolizing are inadequate because they have not the necessary mathematical multiplicity.