An interesting Thread, and some thoughts new to me, and some sources of info , Thanks Dissy!
An analogy I thought of to answer the original "But where shall we go to ? " is the following, if you learned that the water you were drinking was badly polluted, where would you go to ?".
I think this could spark valuable discussion with a JW, they have tacitly acknowledged that their "source" is somewhat polluted by their question. We can show them how to determine if a source is unpolluted.
They have to use the method of finding Evidence and Facts for what they are about to trust is unpolluted truth, Evidence and Facts that will withstand any scrutiny. Depending upon their ability, we may have to show them how to do that, even some "Fact Checking" Sites are polluted, what appear to be valid Academic Documents and Research are not, and many arguments presented by "Believers" are specious etc etc.