solution

What is your reaction to the following claims of Alfred J. Ayer? It is impossible to find a criterion for determining the validity of ethical judgment[s] . . . because they have no objective validity whatsoever. If a sentence makes no statement at all, there is obviously no sense in asking whether what it says is true or false. . . . They are pure expressions of feeling . . . unverifiable for the same reason as a cry of pain or a word of command is unverifiable—because they do not express genuine propositions. What is the logical form of the categorical argument Ayer is proposing here? Is his argument valid? Is it sound?