In school, the biology text book I used (in the 1960s) still referred to the number 48. Today, the only way I can remember is that the number of chromosomes we have is a prime number when it is divided by two. I have spent a life doubting the things we get taught, led to believe or think we saw.

I asked four different people what had occurred on a motor vehicle pile up involving three vehicles just 15 minutes earlier. I got four different stories, but all agreed that there had been a three vehicle pile up. (Needed the info to determine whether on patient was hurt from a side impact or front impact.)