Strangely, the latest word Kamala Harris has chosen to apply to Donald Trump is ‘unserious’. (Or perhaps it was her scriptwriters, managers and handlers who told her to say ‘unserious’? That seems more likely, doesn’t it?) It’s an odd word to fling at Trump as a term of abuse. The dictionaries I consulted suggest that being ‘unserious’ means being ‘blithe or carefree’.