I'm delighted to say that Erin McKean will be guest-blogging here this week. Ms. McKean is the Oxford University Press's Chief Consulting Editor for American Dictionaries; the editor in chief of the New Oxford American Dictionary (2d ed.); the author or coauthor of Weird and Wonderful Words, More Weird and Wonderful Words, Totally Weird and Wonderful Words, and That's Amore; and the author of both the Dictionary Evangelist blog and the A Dress a Day blog. She reports that she'll be blogging this week about Dictionary Myths, "the things people fervently believe about dictionaries, but sadly, aren't true."