A more thorough explanation:

Definition: Question-and-answer is a method of developing evidence during a deposition or trial. It involves a lawyer asking a series of questions to a witness, who then answers them. The witness is not allowed to offer any unsolicited information.

Examples:

• A lawyer asks a witness, "What did you see on the night of the incident?" The witness responds, "I saw two men arguing outside the bar."
• During a trial, a lawyer asks a witness, "Did you witness the defendant committing the crime?" The witness answers, "Yes, I saw him take the money from the cash register."

These examples illustrate how a lawyer can use the question-and-answer method to develop evidence during a deposition or trial. The witness is only allowed to answer the questions asked by the lawyer and cannot offer any additional information. This helps to ensure that the evidence presented is relevant and reliable.