Well, you know, Deuteronomy 18:20-22 says:
"20 However, the prophet who presumes to speak in my name a word that I have not commanded him to speak or who speaks in the name of other gods, that prophet must die. 21 And in case you should say in your heart: 'How shall we know the word that Jehovah has not spoken?' 22 when the prophet speaks in the name of Jehovah and the word does not occur or come true, that is the word that Jehovah did not speak. With presumptuousness the prophet spoke it. You must not get frightened at him."
From this we see that it isn’t the ability to make a true prophecy that distinguishes a prophet of god, but the inability to make a false one. All the prophecies, without exception, must come true, not just some. The man, or group of men, laying claim to being god’s appointed channel cannot make mistakes, because god is not supposed to make mistakes. The television doesn’t suddenly start showing something which isn’t being broadcast at the point of origin, does it?
So this is how I realized the WT is a false prophet even though I still believed the bible. After that it was time to examine the bible itself.
But just another point before that. The WT says this on jw.org in answer to the question, "do you believe that you are the only people who will be saved?"
"No. Many millions who lived in centuries past and who weren’t Jehovah’s Witnesses will have an opportunity for salvation. The Bible explains that in God’s promised new world, “there is going to be a resurrection of both the righteous and the unrighteous.” (Acts 24:15) Additionally, many now living may yet begin to serve God, and they too will gain salvation. In any case, it’s not our job to judge who will or won’t be saved. That assignment rests squarely in Jesus’ hands.—John 5:22,27."
So, even though they say no, they contradict themselves by subsequently saying that those who will be saved include (1) those who were alive before Jehovah’s Witnesses existed, (2) JWs, (3) those who aren’t yet JWs, but who will become so before Armageddon. They lay out no hope for any who do not become JWs before Armageddon. When we look at the publications, we see why.
"Only Jehovah's Witnesses, those of the anointed remnant and the "great crowd," as a united organization under the protection of the Supreme Organizer, have any Scriptural hope of surviving the impending end of this doomed system dominated by Satan the Devil." Watchtower 1989 Sep 1 p.19 "Similarly, Jehovah is using only one organization today to accomplish his will. To receive everlasting life in the earthly Paradise we must identify that organization and serve God as part of it." Watchtower 1983 Feb 15 p.12 "Is it presumptuous of Jehovah's Witnesses to point out that they alone have God's backing? Actually, no more so than when the Israelites in Egypt claimed to have God's backing in spite of the Egyptians' belief, or when the first-century Christians claimed to have God's backing to the exclusion of Jewish religionists." Watchtower 2001 Jun 1 p.16 "During the final period of the ancient world that perished in the Flood, Noah was a faithful preacher of righteousness. (2 Peter 2:5) In these last days of the present system of things, Jehovahs people are making known Gods righteous standards and are declaring good news about the possibility of surviving into the new world. (2 Peter 3:9-13) Just as Noah and his God-fearing family were preserved in the ark, survival of individuals today depends on their faith and their loyal association with the earthly part of Jehovahs universal organization." Watchtower 2006 May 15 p.22 "Are You Prepared for Survival?"
"There are billions of people who do not know Jehovah. Many of them in ignorance practice things that God's Word shows to be wicked. If they persist in this course, they will be among those who perish during the great tribulation." Watchtower 1993 Oct 1 p.19