We need to look for patterns in the birth records of people born around the same time in the same area, but who died at a "normal" age. If the same patterns occ

We need to look for patterns in the birth records of people born around the same time in the same area, but who died at a "normal" age. If the same patterns occur in both cases, it's just lossy record-keeping. If not, there might be something dodgy about the supercentenarians in particular. Without a proper control group, it's all speculation.