IFTNP:
You are referring to John 20:24 "Now Thomas (called Didymus), one of the twelve, was not with them when Jesus came. 20:25 The other disciples told him, “We have seen the Lord!” But he replied, “Unless I see the wounds from the nails in his hands, and put my finger into the wounds from the nails, and put my hand into his side, I will never believe it!”
...anyway, that is not so important, and it`s not the most important argument against the "torture stake"-doctrine. In fact, that doctrine is not important at all, it is just a small detail in all of this (although it does show the intellectual dishonesty of the Watchtower, which is something you would see clearly if you read thru the Leolaia-post). And I can tell from the questions that you do ask, that you know way to little about this religion to take any important decision at this young age. And what is important, is all of the other doctrines of the JWs: - That Jesus is mediator only for the 144000 of Revelation (which is a very, very wrong interpretation of that text), and likewise that only the 144000 goes to heaven. That the rest are just flesh and bone, workhorses for the rest (although they of course won`t tell you this flat out), delivering magazines for the motherTower, with a future promise of eternal, earthly life as the reward (who wouldn`t go for that, by the way). You are heading into a cult that is built in a strict hierarchical manner, a patriarchal hierarchy that pretends to have been given a heavenly justification and mandate from God. And you are a young girl, and therefore on the bottom of the hierarchical ladder. They will walk all over you, step on you, chew you up and spit you out.
And that is the honest to God truth about "the Truth". 15 years from now, when you look back upon the decision to join the JWs, with regret, don`t say that you weren`t warned.