It's Christmas dinner, everyone has had a drink, and the inevitable happens...
Dr Adam Rutherford is a scientist and author of How To Argue With A Racist - a vital new book that uses history and science to debunk the myths and arguments put forward by bigots.
Here he explains what to say in those awkward situations where a family member starts saying something "a little bit racist," and you don't know how to respond.
How To Argue With A Racist is out now.
