While distracted about several things going on in my life yesterday, I wrote about English words derived from Latin and how some distinctions between singular and plural forms are disappearing because of common usage. Two of the words I listed were criterion and its plural, criteria.
Imagine my embarrassment when I received an email from a friend, gently pointing out that those two words are Greek. Damn! I knew that. But I was so intent on my topic of frequently misused singular and plural forms that I lumped them in with the Latin culprits.
Lesson learned: Focus! Concentrate! Even if quotidian annoyances are gnawing at me, I need to set them aside while I take care of the job at hand.
As I said, mea culpa.