The people at the edges of a distribution curve are not extremists. They are the people at the extremes. Adults who are six foot six or more or four foot ten or under are at the extremes of a distribution curve of heights. They are not extremists. If I pass twelve GCSEs and five 'A' Levels all with A-star grades I am at one extreme of the range of achievement but I am not an extremist. So, Keith, try to not be so extremely silly.

(I didn't do nearly as well as that, I hasten to add).