a) they know and
I give you for your delectation and entertainment this offering, courtesy of News Thump, which, as you will gather from its title, is a serious, heavyweight publication aiming to defer to no-one in its quest for the truth.
eg. "The study also discovered that although there was a precipitous fall in French sperm count, the gallic feeling of self-importance was as strong as ever amongst the subjects."
You read it here first, folks!