For students of mathematics, one of the best ways to detect a misunderstanding is to detect a contradiction. "If this is true, then how can this also be true?" I love getting that sort of question in class because it means the student is working through the implications of an idea and wants to reconcile his understanding with some other claim.
As an example - "if log (x + y) = log(x) + log

, then why isn't it working out that way on my calculator?" The student has heard something, has tested the idea by other means, and found some contradiction. Over time, he will conclude that his initial understanding was wrong and will adjust his ideas. "Oops, I believed something wrong about the logarithm. Fixed. Let's move on." This only occurs, however, because the student was open to the idea that his initial understanding might be wrong.
There is another student who has a completely different set of assumptions but can ask exactly the same question. He is under the assumption that all his ideas are
already necessarily correct; any idea that contradicts them has to be a problem with the source. The question, therefore, is not asking for help to reconcile his ideas with what he's just heard, but is asking the instructor to defend his claim against the truth the student presupposes. This sort of conversation is remarkably unfruitful, even in the context of mathematics where the truth can be unambiguously demonstrated.
You can quickly and easily tell who these students are. They answer "yes, but..." to every example that does not seem to favor their initial idea. They are not open and they are not asking a question - they are trying to teach, no matter how many question marks they stick at the end of sentences. The only way to get something fruitful from the conversation is to acknowledge that they disagree and move on.
NWL, we understand that JWs differ from many Christians on the nature of God and Jesus and the scriptures used to discuss them. There are genuine questions to be asked in this area, but you're not asking them. You're arguing for a particular interpretation. Nothing is inherently wrong with that, but you're being overly coy about it and, frankly, treading too close to simply lying about your intentions.
The questions marks don't protect you in the way you suspect, because you don't let someone get a word out before you start objecting. I have dealt with thousands of students are you are a textbook example of hiding an objection within an apparently innocent question.
You're a Jehovah's Witness (and it took forever to get that out of you) and you're asking Christians around here to defend their view of Jesus' divinity and the Trinity. The questions don't occur because you detect a contradiction and think your understanding is faulty - they occur because you think most Christians here are simply wrong.
If you don't change your strategy, you will either burn out or get kicked; this isn't a threat, just a statistical observation. People who act like this don't survive.