JWoods: "One obvious example is that you can easily get yourself disfellowshipped for promoting certain (and many) ideas that they taught as absolute truth not much more than 2 or 3 decades back."
Yes JWoods there are many examples. But the point I'm trying to make is that most of those examples are too abstract for the non JW and even for most JWs. The example I gave about their position on rape is far more visceral and down to earth than practically anything else they teach. This more so if you're talking to a woman (Bible Study? Regular JW female who hasn't read those watchtowers?).
That is how I would grab their attention and refute their "adjustment", "refinement", "light gets brighter and brighter" cliches.
villabolo