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Many questions, also known as complex question, presupposition, loaded question, "trick question", or plurium interrogationum (Latin, "of many questions"), is an informal fallacy. It is committed when someone asks a question that presupposes something that has not been proven or accepted by all the people involved. This fallacy is often used rhetorically, so that the question limits direct replies to those that serve the questioner's agenda. An example of this is the question "Are you still beating your wife?" Whether the respondent answers yes or no, he will admit to having a wife, and having beaten her at some time in the past. Thus, these facts are presupposed by the question, and if it has not been agreed upon by the speakers before, the question is improper, and the fallacy of many questions has been committed.

The fallacy relies upon context for its effect: the fact that a question presupposes something does not in itself make the question fallacious. Only when some of these presuppositions are not necessarily agreed to by the person who is asked the question does the argument containing them become fallacious.

A related fallacy is begging the question, in which a premise is included that is likely to be at least as unacceptable to an opponent as the proposed conclusion.

One form of misleading discourse is where something is implied without being said explicitly, by phrasing it as a question. For example, the question "Does Mr. Jones have a brother in the army?" does not claim that he does, but implies that there must be at least some indication that he does, or the question would not need to be asked. The person asking the question is thus protected from accusations of making false claims, but still manages to make the implication in the form of a hidden compound question. The fallacy isn't in the question itself, but rather in the listener's assumption that the question would not have been asked without some evidence to support the supposition. This example seems harmless, but consider: "Does Mr. Jones have a brother in jail?"

In order to have the desired effect, the question must imply something uncommon enough not to be asked without some evidence to the fact. For example, the question "Does Mr. Jones have a brother?" would not cause the listener to think there must be some evidence that he does, since this form of general question is frequently asked with no foreknowledge of the answer.

A common way out of this argument is to not respond with a simple 'yes' or 'no' answer, but with a full statement that also includes context. To use an earlier example, a good response to the question "Do you still beat your wife?" would be either "I have never beaten my wife" or "I have never had a wife." This removes the ambiguity of the expected response, therefore nullifying the tactic. However, the askers of said questions have learned to get around this tactic by accusing the one who answers with "dodging" the question. The best tactic when faced with this kind of opponent is to ignore the question entirely or to point out that the question is, indeed, a loaded question.