From all reports here ,the average JW could not debate his belief to a five year old child let alone an adult who knows a little bit more about the bible.
The dumbing down over the years of the "truth" is sure going to have repercussions in the future.
All JW`s want to do now is dictate to you what they believe and if you question them on topics of theirs you are aware of they dont want to discuss them with you and beg to leave.
Their is no substance in what they claim to believe where they can have a meaningful discussion with you when you know something about their religion.