WBTS rewrites/carefully edits their own history. Since 2005, I have been through a lot with with WBTS. Recently I came across a suggestions that they will start denying that they ever said Satan was hurled out of heaven in 1914.
In my experience, it is one doctrine many ordinary members are clear about - you ask them what supposedly took place in 1914 and they'll say, "Satan was hurled out of heaven, therefore World War I started."
I can't guarantee that they will rewrite this doctrine but, if you have relatives who are PIMI and hold firmly to this belief, why not ask them (if they'll talk to you) how they would feel if WBTS denied ever saying Satan was hurled out of heaven in 1914. Especially if they start blaming the rank and file for making it up - or maybe they'll blame Jesus instead. Who knows.
Anyway, for reference here is one place where it is clearly stated:-
*** w04 2/1 p. 20 par. 10 “The Scene of This World Is Changing” ***
So Satan the Devil is the guilty troublemaker, and his ouster from heaven in 1914 has meant “woe for the earth and for the sea, because the Devil has come down to you, having great anger, knowing he has a short period of time.”—Revelation 12:10, 12.