These ones also made mistakes (apostles, David, cicumcision issue, Paul's issues with brothers, etc.),
and they continued in Gods favour
Couldn't all religions claim the same thing then based on this. That they make mistakes because they are sinful/imperfect
but still curry God's favor?
What does her own bible say? Ask her how many times the first century christians picked dates for the end to come.
Then have her read Luke 21:8 from her NWT:"He said: “Look out that YOU are not misled; for many will come on the
basis of my name, saying, ‘I am he,’ and, ‘The due time has approached.’ Do not go after them"
Then after reading that scripture to her from the society's own translation of the bible, ask her how many times has the
Watchtower society (J.W.'s) claimed that the end was at hand? Ask her if the years 1914,1925,1975 etc. ring a bell?