We’ve all been there, that shocking moment when a girlfriend blithely announced she liked Marmite, or more recently when an old rugby pal spoke warmly of Jeremy Corbyn. I suspect I may actually have one or two acquaintances that rather like the music of U2.

Psychologists have a name for it: The false consensus effect.

There’s been a lot of it about this past year. Particularly for the liberal media which have had to accept that perhaps their own views are not as universal as they thought when it comes to, for example, Brexit and Donald Trump.