Wittg.–

     At a pinch, we are always inclined to explanations of logical functions of propositions which either only contain || aim at introducing into the function either only the constituents of these propositions, or only their forms, etc. etc.; & we overlook that ordinary language would not contain the whole propositions if it did not need them: However, e.g., “not-p” may be explained, there must always be a meaning given to the question “what is denied?”