Any answer on False Prophets will be skip in their head .. the have a fallacy or tendency to respond that
"God's People dont Lie only make Mistake because of human error in interpreting the holy spirit's message"...
So debating on false prophets are useless to them because of the belief and who their Representative is and More recently, the WTS has tried to escape the "false prophet" label by saying Jehovah's Witnesses have not made prophecies in God's name. "Never did they say, 'These are the words of Jehovah.'" (Awake! March 22, 1993, p. 4)
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Even if we show it to their face the truth,,,from the bible will be discarded .. ( So much for people to claimed that the Bible is from God..)
Edit: the 1914 Generation is an example
The most recent prophetic failure is likely to have the greatest impact on JWs: 'New truths' in the November 1, 1995 Watchtower magazine changed the beliefs of Jehovah's Witnesses concerning "the generation that saw the events of 1914," and the November 8, 1995 Awake! drops that magazine's long-standing prophecy.
Ever since the late 1940's Awake! magazine had been promising the "sure hope for the establishment of a righteous New World" on page 2 of each issue. Then in 1964 it added the thought that this would happen "in this generation" -- "...reflecting sure hope for the establishment of God's righteous new order in this generation."
In 1975 it was no longer Awake! magazine's promise but now became the Creator's promise: "...the Creator's promise of a new order of lasting peace and true security within our generation." -- January 8, 1975
It was a very serious step to add this expression, "the Creator's promise," since it meant that the Watchtower Society (the magazine's publisher) was now prophesying in the Creator's name -- in God's name. The Creator warns in the Bible against doing this without receiving a command from Him to do so:
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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. You may say to yourselves, "How can we know when a message has not been spoken by the LORD?" 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. -- Deuteronomy 18:20-22 NIV
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Did the Creator really command the Society to say that He promised the new order would come "within our generation"? Elsewhere, the Society specified more precisely what it meant by "our generation":
"Jesus was obviously speaking about those who were old enough to witness with understanding what took place when the 'last days' began....Even if we presume that youngsters 15 years of age would be perceptive enough to realize the import of what happened in 1914, it would still make the youngest of 'this generation' nearly 70 years old today....Jesus said that the end of this wicked world would come before that generation passed away in death." -- Awake! October 8, 1968, pages 13-14
In 1982 the Watchtower Society changed the prophecy on page 2 of each Awake! issue to include the same thought about 1914. It was no longer a vague "our generation" that would see the world's end, but the generation that saw the events of 1914: "...the Creator's promise of a peaceful and secure new order before the generation that saw the events of 1914 C.E. passes away." (January 8, 1982)
Nearly identical wording repeated the same prophecy in each issue until January 8, 1987, when Awake! magazine's statement of purpose was moved to page 4 in a redesigned format. Starting with that issue, the 1914 generation prophecy was dropped entirely. Then it was restored on page 4 of the March 8, 1988 issue -- "...the Creator's promise of a peaceful and secure new world before the generation that saw the events of 1914 passes away" -- wording that continued to appear through October, 1995.
By then, however, the generation that saw the events of 1914 had largely passed away. All that remained were a relatively few surviving individuals in their late 90's -- people nearly a hundred years old.
Obviously, the prophecy had failed.
Deuteronomy 18:20-22, quoted earlier, supplies the basis for determining the answer. It states that its words of condemnation apply when what a "prophet proclaims in the name of the LORD does not take place or come true."
Was the prediction spoken "in the name of the LORD"? Yes, because it was introduced as "the Creator's promise."