... when politicians are lying? Their lips move!
It's an old joke, but during the recent bitterly fought campaigns for and against Britain remaining in the European Union, many so-called honourable members may have inadvertently done their worst to make it true.
My friend Graham Hutton thinks that politicians should be held to the same standards of honesty as company directors - who can be disqualified for five years if caught knowingly misleading the public. If you agree, please sign Graham's e-petition on the UK Parliament web site!