It does little good to point a JW to changing doctrines, since they expect it. They get all giddy when 'New Light' shines on them and they get a clearer understanding of the Bible. Even if it is actually a return to what was previously declared 'old light', they still suck it down and smile.
How do you defeat that? Is there some sort of reasoning or scripture that gets around it?
I can't see asking them, "Does 'truth' change?" Because obviously the real truth doesn't, but they admit they don't have the real truth. They have the truth as it is understood today by the FDS. Since the FDS is the most enlightened group in the world, anything they say must represent the cutting edge of truth, even if it's technically false, right?
Even outright disproving a currently-held doctrine won't do it, since they will just tell you that if Jehovah cares about that particular point, he'll shine a little 'new light' on it and clear it up in his own due time. We must "wait on Jehovah". (Give the guy a break, he's old.)
I read over the 4th chapter of Proverbs where they justify this 'new light' doctrine and while it seems to be describing the life of an individual as he comes to know wisdom better, I can see someone applying it to a group of individuals. I don't immediately see this as a misapplication of the verse. (By all means correct me if you disagree)
Do you think this doctrine and the "Faithful and Discreet Slave" doctrine are basically one and the same? (I'm starting to think that they are)