Rebute during an job interview!

You may have seen a few lists of difficult interview questions, however it doesn't mean there is a correct way to answer any of the questions. The question which caught my attention, or should I say hit me where it hurts, is "If I were to tell you that you aren't ambitious, how would you refute me?" 

My first reaction is to ask if that is a projection. That is if you are insecure about something, you tend to attack others with your sense of insecurity.