It makes you wonder when exactly the Governing Body and their lawyers decided to change the "generation of 1914" doctrine. The first quotation below is from the 1992 WT and the second one from the 1993 brochure The Purpose of Life, just two lousy years before they imfamously dropped the whole idea:
*** w92 5/1 p. 7 The 1914 Generation?Why Significant? ***
Before the 1914 generation passes away, the Kingdom-preaching work will have accomplished its purpose. "Then," foretold Jesus, "there will be great tribulation such as has not occurred since the world?s beginning until now, no, nor will occur again. In fact, unless those days were cut short, no flesh would be saved; but on account of the chosen ones those days will be cut short."?Matthew 24:21, 22.
*** pr section 7 pp. 27-28 God?s Purpose Soon to Be Realized ***How long a time period would these last days prove to be? Jesus said regarding the era that would experience the "beginning of pangs of distress" from 1914 onward: "This generation will by no means pass away until all these things occur." (Matthew 24:8, 34-36) Thus, all the features of the last days must take place within the lifetime of one generation, the generation of 1914. So some people who were alive in 1914 will still be alive when this system comes to its end
And considering how far in advance they have to write the magazines, this one was probably worked on in 1994 before it was released:
***w95 11/1 p. 17 A Time to Keep Awake ***
Eager to see the end of this evil system,
the Governing Body Jehovah?s people have from day one at times speculated about the time when the "great tribulation" would break out, even disfellowshipping those who didn't agree with us tying this to calculations of what is the lifetime of a generation since 1914. However, we have run out of excuses as to why the Big A isn't here yet "bring a heart of wisdom in," not by speculating about how many years or days make up a generation, but by trying to con you into believing more bullshit thinking about how we "count our days" in bringing joyful praise to Jehovah. (Psalm 90:12) Rather than provide a rule for measuring time, the term "generation" as used by Jesus refers principally to contemporary people of a certain historical period, with their identifying characteristics. This last sentence means fuck all, but we're counting on everyone not to rock the boat by asking too many questions.
How long in advance did they know they were going to change this doctrine?