John 17:3 "This means everlasting life, their taking in knowledge of you, the only true God, and of the one whom you sent forth, Jesus Christ" -NWT
The JW's interpret this scripture with the word "knowledge" being associated with information - in fact, my father always threw in the word "accurate"...."their taking in acurate knowledge of you" - in other words, you have to believe in the right doctrines and if you have faith in Jesus but believe in the wrong doctrine you don't have life........
But the greek word used for knowledge here is not the same word that the greeks use for "information" - it is a word that means a personal knowledge - for example "I know him, he's my friend".
So the scripture REALLY means that to gain everlasting life one needs to have a relationship with Jesus - to know him in a personal way. The NIV version translates it more accurately as "Now this is eternal life: that they may know you, the only true God, and Jesus Christ, whom you have sent"
I think that's a HUGE misinterpretation by the JW's.