 Mood together with content underdetermine force. On the other hand it is a plausible hypothesis that grammatical mood is one of the devices we use (together with contextual clues, intonation, and the like) to indicate the force with which we are expressing a content. Understood in this weak way, it is unexceptionable to construe the interrogative mood as used for asking questions, the imperatival mood as used for issuing commands, and so on. So understood, we might go on to ask how speakers indicate the force of their speech acts given that grammatical mood and content cannot be relied on alone to do so.