If there were anybody in your life past or present and you could ask him or her any question and get an honest no hold barge answer. Who would you ask? What would you ask? Do you really think you would want to know the truth? Do you think it is possible that once you had your answer you would really have been better off staying in the dark? What would you hope to gain by knowing?
If you were the one being asked and the person told you to be honest could you do it? Who would you most fear asking you for the truth?