I don’t always get xkcd although often enough I think it’s quite funny and on occasion I think it’s just brilliant. Here’s one I’m surprised my students haven’t put on a T-shirt for me yet. And you might recall our CT discussion of this one. Today, Randall Munroe has added another to my collection of favorites, check it out. (I even forgive him for a slight misspelling at the end. I won’t get into specifics, because it would be a spoiler. See the first comment below for more. UPDATE an hour later: typo I write about has been fixed.:)