As any of you who are regular viewers of #BBCTBQ (as its hashtag goes) will know, there often follows a fairly dyspeptic exchange with more heat than light frequently generated. My principal "opponent" was a psychologist by the name of Oliver James, who takes the view that genes don't really tell us very much about variation in human psychology or IQ, and therefore it's a waste of time. I disagree on both points, but even if he was right about his first point (and he's not), it would be like saying bananas are no good because you can't use them to make marmalade.
Medicine marches on, and as we uncover more about our genes, we are learning how to make life better for people. That strikes me as a worthy goal. Gastric juices a little too alkaline? Fix that by watching the whole thing on iPlayer here!
[Thanks to Mentorn Media - they own the screen grab]