booker-t, The Watchtower of May 1, 1977, page 8, described a simple two part test for identifying a true messenger (or prophet) of Jehovah. It reads:
“Jehovah God is the Grand Identifier of his true messengers. He identifies them by making the messages he delivers through them come true. Jehovah is also the Great Exposer of false messengers. How does he expose them? He frustrates their signs and predictions. In this way he shows that they are self-appointed prognosticators, whose messages really spring from their own false reasoning – yes, their foolish, fleshly thinking!”
I suggest you ask this CO to give an example of even a single message that the WTS has delivered that has come true (and no after the event prophecies). I for one would be eager to hear them.
Then I would ask him to explain the following messages that have not come true (I could give you plenty more examples, but this dozen should suffice). Surely, by the WT’s own yardstick, they are a false messenger!
1). The Battle of Armageddon would end in 1914 (Studies in the Scriptures, Vol. II, 1889 Ed., page 101, Studies in the Scriptures, Vol IV, 1897 Ed., page 622 and The Time Is At Hand, 1902 edition, page 99).
2). The Battle of Armageddon would end in 1915 (Studies in the Scriptures, 1915 Ed., Vol. II, page 101 and The Time Is At Hand, 1915 edition, page 242).
3). The Day of Vengence would break in 1918 (Studies In The Scriptures, Vol VII, The Finished Mystery, 1917, page 404 and Studies In The Scriptures, Vol VII, The Finished Mystery, 1917, page 485).
4). All of the governments would be swallowed up in anarchy by the fall of 1920 (Studies In The Scriptures, Vol VII, The Finished Mystery, 1917, pages 258 and 542).
5). The Kingdom in Palestine will be set up in 1925 (Studies In The Scriptures, Vol VII, The Finished Mystery, 1917, page 128).
6). The prophets of old would be resurrected in 1925 (Millions Now Living Will Never Die, 1918 edition, page 89 and 1920 edition, page 97).
7). Armageddon is coming within months of 1935 (Universal War Near, 1935, pages 3, 26 and 27).
8). Armageddon is coming within months of 1941 (Watchtower September 15, 1941, page 228).
9). The prophets of old would be resurrected in 1942 (Consolation, April 27, 1942, page 13).
10). Armageddon would come within the lifetime of people alive in 1914 (Watchtower, June 1, 1951, page 335, Watchtower, July 1, 1951, page 404 and You Can Live Forever in Paradise on Earth, 1982, page 154).
11). Armageddon would come in the mid 1970s (Awake October 8, 1966, page 20, Watchtower, May 1, 1968, Watchtower, August 15, 1968, page 499 and Awake!, October 8, 1968, page 14).
12). Armageddon would come in the 20th Century (The Nations Shall Know That I Am Jehovah; 1971, 2nd edition pages 216 and 356 and Watchtower January 1, 1989, page 12).