  Not only does content underdetermine force; content together with grammatical mood does so as well. ‘You’ll be more punctual in the future’ is in the indicative grammatical mood, but as we have seen, that fact does not determine its force. The same may be said of other grammatical moods. Although I overhear you utter the words, ‘shut the door’, I cannot infer yet that you are issuing a command. Perhaps instead you are simply describing your own intention, in the course of saying, “I intend to shut the door.” If so, you’ve used the imperative mood without issuing a command. So too with the interrogative mood: I overhear your words, ‘who is on the phone.’ Thus far I don’t know whether you’ve asked a question, since you may have so spoken in the course of stating, “John wonders who is on the phone.” Might either or both of initial capitalization or final punctuation settle the issue? Apparently not: What puzzles Meredith is the following question: Who is on the phone? 