You can't...evidence doesn't work.
How Would You Prove To A JW That They Are Wrong?
I don't know.
How would you prove to Teddy Brewster that he wasn't really Theodore Roosevelt?
The problem, prove that Bible is wrong. The last conversation with one of my JW family member, "so you don't believe in the Bible". That was the end of the conversation.
It's easy to "prove" many of their beliefs and practices are wrong, unbiblical and even harmful.
What's impossible is to convince them of any of this.
That's not how cult indoctrination works and not how it can be undone.
And let's review: It's a cult!
One way to convince JWism is wrong. Did someone mention ''Crisis of Conscience''? By Ray Franz. Or other great books by cult specialist Steven Hassan.
One can plant seeds of doubt but that can go in one ear and out the other. Ironically using their same words when a person is ready to accept and learn the truth then they can open their eyes to reality.
To this day i still remember two conversations where reality did not matter to a person i care about deeply. Facts and reality wont help when the other person yells i believe in the bible.
As the wind blows we can't see it, but 'seeds' are being transferred through the air all the time. That's how a lot of 'plant' life is started. Although it may not seem like 'seeds' are being planted, I'm sure that some 'thoughts' could be 'planted' in some JW's minds, maybe.
The JWS religion is theologically Apostate by virtue by it being entwined and controlled by sinning false Prophets and their personal agenda to proliferate literature.
Has there ever been a bold and specific WTS prophesy that has come to pass?
If yes, what?
If no, Why not?
Answer - the light is getting brighter, the light is getting brighter, the light is getting brighter
If the WTS earnestly states that 'the great apostasy' of Christianity happened in the early 4th century, then how can they trust the bible to be the true word of God when the bible wasn't confirmed until the late 4th century?
Confirmed by Catholic Bishops no less!