Dk 775T: "think about this: Adam was supposed to be born about 6000 years ago and Jesus is "the last Adam" so that's at least a 6000 year generation, no that is taking it too far, the two Adams did not overlap. but:
if Shem lived to 630! and Abraham to 175!, and they overlapped by 150, that makes these two grouped into one -- generation one of 655 years long, - deduct 5 years for the age of memories of Abraham,= 650 ; plus 1914= 2564 CE. better (for wt) than 2075 derived from 2 overlapping Freddy Franzes.