If according to the WT, overlapping generation theory is true,then someone born in 1914 could live to be 100, then overlap with another person born in 2014 who also lives to be 100,bringing us to 2114. By that time any? Jehovah's Witness will have long forgotten that once upon a time 1914 was pointed to as the start of the Last Days.
A close insider in Patterson told me John barr proposed the overlapping theory on the GB meeting. The sanity of that explanation was at first suspicious because He had just been diagnosed of schizophrenia and chronic dementia. But, two-third majority vote made it acceptable.