fu: current jws do not do analysis. but wt writers have dug themselves into an even deeper mess, when they declared the generation to be the anointed.
That meant that at the starting point of 1914 they had to be at least 21 year olds like Fr. Franz's example -- to be counted, as D. Splane pointed out.
Only a few Okinawans, Sardinians and southern France lady citizens would make it past the year 2000. none of them the stressed jw faithful, putting in 15 minutes per month.