The worst thing to do is to get into doctinal discussions...two reasons:
1) they can be Jehovah's Witnesses and be in total disagreement with all the major doctrines. (Catholics do that too)
2) they can leave the Watchtower and carry all the doctines with them. (happens on this board all the time. )You do not want this.
The best way is to find non-doctrinal issues they can relate to.
1) why can't women carry microphones? yet it's okay for them to clean toilets? same woman, same Kingdom Hall. Why can't women do the reading at the bookstudy, taking it in turns with the men? That isn't 'teaching'.
2) Does it seem fair that women should be expelled/shun for not resisting a rape when, in the scriptural citation, the woman was a virgin, in a field, was an Israelite under a law that only applied to israelites. Most of the time those circumstances don't apply; so why is only the screaming part literal.
3) We are supposed to keep the memorial until Jesus comes again; he came in 1914. Shouldn't we have stopped then?
Stuff like that. There's a lot more stuff like that. And pretend it's a conversation your having with someone else and you 'need her help'.
UADNA-US (Unseen Apostate Directorate of North America-United States)