JW, I would just like to say one thing: The Bible never says that you have to be guided by the holy Spirit to distinguish between a false prophet and a true prophet. The guidelines for distinguishing between a true and a false prophet is given in:
Deuteronomy 20 But a prophet who presumes to speak in my name anything I have not commanded him to say, or a prophet who speaks in the name of other gods, must be put to death." 21 You may say to yourselves, "How can we know when a message has not been spoken by the LORD ?" 22 If what a prophet proclaims in the name of the LORD does not take place or come true, that is a message the LORD has not spoken. That prophet has spoken presumptuously. Do not be afraid of him.
...it really is pretty simple: If the prophet fails in his predictions, then he/she/it is a false prophet! This, that the prediction either comes true or it doesn`t, is the only criteria that decides whether the prophet is a real prophet, or an imposter! And the WTBTS has shown itself to be the false prophet spoken of in the Bible, numerous times, as all their predictions has failed (1874, 1914, 1915, 1925, 1975, before the literal generation died out in 1995, etc). No need for any holy Spirit to see the wolf in sheeps clothing. All the people can do it, says the Bible. Except for those that have allready allowed themselves to be fooled by the wolf, of course...