This question already has an answer here:

'This is a not uncommon mistake.' 'This is not an uncommon mistake.' Are those sentences above both means 'This is somewhat common mistake.' ? or could they have different meanings?

marked as duplicate by NVZ, pyobum, anongoodnurse, Phil Sweet, Chenmunka Jan 20 '17 at 9:33

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Changing word order in such a minimal way (moving the article) doesn't change the sentence meaning. They mean exactly the same thing. And, yes, your correct (kind of). Somewhat common is probably more common than not uncommon. I would estimate that common > somewhat common > not uncommon > uncommon. – anongoodnurse Jan 20 '17 at 4:21
  • From memory, I've noticed 'uncommon' only in contra-distinction… Is that common? Not really, but it's not uncommon – Robbie Goodwin Feb 2 '17 at 15:42

This is a way of saying that "it" could be described as common or of average frequency/supply, but that the only thing they can say with confidence is that the the frequency at which something occurs, or the amount of something that exists, is not below average.

These statements have to do with the fact that its not so black and white. Things are not all either common or uncommon. Sometimes the amount of something is not notable at all (it is not oddly plentiful or oddly rare). Common generally means notably more than average, uncommon generally means notably less than average. The averages in question are usually largely contextual. And, of course, things can only be common or uncommon relative to their rarity in other areas.

It's a way of saying "I wouldn't say they are common, but I definitely would not say they're notably infrequent or rare". Another way of saying it: "you might regard the mistake as common, but I don't feel that safe calling it common. I would not call it uncommon, either, however."

Hes basically saying "the frequency with which it occurs is not noteworthy to me" or that he does not know much about the frequency, but that he does feel he knows enough to say that it would not generally be perceived as being uncommon. He does not personally think of it as particularly rare OR abundant (either because he thinks its average or because he simply doesnt know enough about it) but he believes it wouldn't be too much of a stretch to call it common.

Not the answer you're looking for? Browse other questions tagged or ask your own question.