Yes, yes, yes - 'sciolism' is indeed my lost word! Many thanks indeed.
I first met the word at least 15 years ago in a "Unusual Words" feature published once-a-week in the London Times.
It is a dandy word to have in one's lexical arsenal - in this day and age of widespread pontification by semi-, quasi- or pseudo- literates!

I hope this gets to you, Tsuwm - thanks again