For many years cynics posed the question – how do you know when a politician is lying?

The answer of course was: when you see their lips moving.

For all the talk about the evils of social media and fake news there is a new version of the hoary old favourite.

How do you know today when a politician is lying?

The answer this time, of course, is when their lips or thumbs are moving.

Abundant evidence exists, that for those of high intelligence and genius status it is possible, and possibly essential, that they do both at once.