Just wanted to add that the phycology of JWs is such that you can never win an intellectual argument, at least not usually.
The problem is that as soon as you become to much of an intellectual challenge for them, they will begin to take pot shots at you. It happens every time. They will basically say something to the effect of "you just want to beat the slave" or "so, you think you have all the answers" or possibly "so where did you get all this great knowledge that the faithful slave doesn't have?" They will basically accuse you of pride, selfishness and the like. This is because they have no other way out, no other choice.
There is yet another problem. JWs are fixated on having 'answers'. This means that even if the JW you are talking to begins to confront their doubts they are going to start coming after you with "what if" questions about certain doctrines. Because they are used to having every little detail dictated to them, they are going to demand the same from you.
This is of course not fair at all. A person leaving a religious system that claims to have a hold on as much 'truth' as the JWs can never just leave and at the same time have figured out their position and argumentation for every single piece of theology and teaching. It's not reasonable. That doesn't mean however that a person can't realize that the JWs are wrong and still leave, because they sure can. It's just that there is no way that a member who recently leaves could ever satisfy the JWs desire for 'answers' to their questions. And even if they did, whe are back to my previous point of the JWs calling a 'bluff' by simply stating that you are just arrogant and a know it all.
I would also add that JWs in general treat fellow members who deflect from the group much worse in a discussion than they would any random person who is not JW. Especially in a debate. Because you have already 'agreed' to believe much of what is taught they will keep coming back to "but look at all the good stuff" type argument. This is much differant for a person who was never JW showing a JW 20 or 30 pages of Watchtower lies on paper. It is much more embarrassing and the JW can't resort to emotional and personal attacks because it would be much to disrespectful (not that they wouldn't do it, but because of the social factors it's less likely).
All this considered I really think it's best you weigh the options. Once you open up to them about this, the relationship is ever changed. If you parents haven't opened up with doubts yet, then it is a real gamble.
