I am sceptical about our UK spelling of scepticism &c because your skepticism as in thread title is much nearer to original Greek 'σκέπτομαι' skeptomai.

I generally prefer to use our spellings [despite the efforts of my 's spellcheck [about which I am also sc/keptical, as it will underline words like honour or colour even when set to tha Union Flag in the menu ~ so why bother with a notional British-spelling option if it doesn't even work? FYI those 2 words above have a dotted-red-line underneath even as I type!]; but I give u-guize best over skeptical

~Michael~