5.1311

When we conclude from p∨q and p to q the relation between the forms of the propositions “p∨q” and “p” is here concealed by the method of symbolizing. But if we write, e.g. instead of “p∨q” “p|q.|.p|q” and instead of “~p” “p|p” (p|q = neither p nor q), then the inner connexion becomes obvious. (The fact that we can infer fa from (x).fx shows that generality is present also in the symbol “(x).fx”.