In my part of the Borgdom......... only men care about or discuss 607.
The last time a Brother and I began such a conversation I allowed him to go through the whole spiel.......and instead of agreeing with him like most totally overwhelmed girls........ I simply asked if he could also explain the development and timeline of said chronology within the Organization.
He is still working on that little project....
I don't see the point in arguing the chronology with a newly awake or asleep JW. The belief is still too strong, so discuss the finer points of what, when and how allows them to explore 607 safely and see it hasn't been as 'concrete' as the Org presents today.......Most JWs assert the 1943 chronology as having been present in 1914.