An English professor once remarked that it was mildly interesting that two negatives make a positive in English, but two positives never make a negative. A voice from the back of the room came out with “Yeah, right.” So if you include sarcasm, you can do it. I’ll add an interesting linguistic fact: In Greek, two negatives make the negative stronger. It’s as if to say “definitely not!”
I like the comic Candorville, by Darren Bell, partly because the main character, Lemont, is not only a writer, but also is somewhat of a grammar curmudgeon, rather like me in both cases. Here’s a lesson, from September 22, 2012 in getting a negative right.
And don’t get me started on “I could care less.”
P.S. This comic appeared just after I finished this post. http://www.gocomics.com/