As that and successive years came and went, a further examination suggested maybe those who were 10 years old were to be counted, and so on. Now the year 2000 is coming. Soon, all will have passed away. The main problem with the argument is met when taking the term 'generation' to mean a chronological period. Insisting on that, as the Witnesses have done, eventually you fall into your own trap.
Time runs out.
Hence a new definition of 'this generation' emerges meaning a group or class of people not a specific time period. However, we 'bring a heart of wisdom in,' not by speculating about how many years or days make up a generation, but by thinking about how we 'count our days' in bringing joyful praise to Jehovah. 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. Most serious Bible students would find little fault with the above statements were they not made against the background of over 100 years of consistent adherence to the original doctrine and claims to the contrary. Especially the dogmatic predictions of a number of end time years, including 1975, that were all similarly treated by the Governing Body.