Note to anyone who might be a witness in a courtroom one day:

When an attorney tries to hammer you by asking you a question, you give what you think is not yet a complete answer, and attorney demands, "Yes or no? Yes or no?" or says, "You answered, that's enough!" then the attorney is intentionally trying to stop you from giving more of an answer that might harm his own case.

Here is what you say in response:

"Sir/Ma'am, I have sworn to tell the truth, the WHOLE truth, and nothing but the truth. If a yes or no answer, or an incomplete answer is not sufficient to honor my oath, then I will finish my answer fully -- and you will not tell me to give an incomplete answer."

You could also say, "If yes or no is not the whole truth, then you will have to give me immunity against perjury; otherwise, I will give my complete answer."