Debating with my parents about doctrine is like trying to wrestle a greased eel. We were talking about how I feel about the religion and since I'm only starting my fade I didn't mention anything too blatant. I just told her I was having a real problem with 1914 and 607. I told her I haven't been able to find one secular source that says Jerusalem was destroyed in 607, but that they all say 586. (side note, I need to look up information on the reasons for 586 instead of 607). She said that her and my dad will do some research. Then she said that even if Jerusalem wasn't destroyed in 607 it wouldn't really affect her faith, all that would mean is that Jesus came to earth in 1935, but it doesn't change how close the end is. I'm not really prepared well for these conversations (heh, I guess it's kind of like preparing for service, except for opposite ends), so I don't really say much. She said that the apostles were wrong about the timetables of many of their expectations, but that didn't make them false prophets.
My parents are kind of different than the rank-and-file. They see the GB as fallible men that make mistakes and don't believe things they don't agree with. I don't think they'd directly kill others or themselves for the organization. This is what makes arguing with them frustrating. You could prove every JW doctrine wrong, and they'd still be witnesses.