I used to present lots of facts from articles and scriptures, but now my approach is different.
I open a calendar and ask when the person was born. Then I say, Oh that's not even on this calendar. Do you remember when Charles Taze Russel went to visit Jerusalem? They almost always say no.
Then I say - "Neither does anyone else because they are all dead for many decades."
It never sways anyone but I do it anyway.