I was the "good JW", that accepted everything they taught, without even thinking of searching to see if it was true. And how could I have searched to see if what they preach was true? I don't speak hebrew or greek. And even if I spoke those languages, where would I find the truth.
For me, knowing that God's name was Jehovah or JHWH and that he was one, not a trinity, eliminated so many other religions. Other religions were also eliminated because they didnt teach about Armageddon, the great tribulation, paradise earth and so on.
So, basically, I used negative logic to end up as a JW, then I blindly accepted everything they taught.