YOU JUST HAVE TO PAY ATTENTION. the same goes for the overlapping groups in the 1914 generation. David Splane clearly explained it well, with charts even, and real flesh and blood examples like Frederick Franz. and even older anointed ones.
2 centenarians make 200 years, starting to partake, overlap by 20 years each, make 40 years, NET total 160 years. plus 1914 = 2074 plus 1 year of shortened GT after rapture of anointed,= 2075. Armageddon time. minus 100 =1975. perfect timing.
what wt has not explained yet, is, how the anointed generation dies at the onset of the great tribulation, but also after all has occurred.