A more thorough explanation:

Definition: A demurrer to interrogatories is an objection or reason given by a witness for failing to answer an interrogatory.

Example: During a trial, a lawyer may ask a witness a series of questions called interrogatories. If the witness refuses to answer a question, they must provide a demurrer, or a valid reason for not answering. For example, a witness may demur to an interrogatory if they believe the question is irrelevant to the case or if answering the question may incriminate them.

Explanation: The example illustrates how a demurrer to interrogatories works in a legal setting. It shows that a witness cannot simply refuse to answer a question without providing a valid reason. The demurrer allows the witness to object to a question without facing consequences for not answering.