I call her my lost-at-birth twin sister. And she obviously got the grammar gene, because the guys over at NPR interviewed Julia Temlyn a couple of days ago to explain the correct meaning of “begs the question.”

You can listen to the segment here:
http://www.npr.org/templates/story/story.php?storyId=17246007

And if you’re still confused about it, as I was, she explains it on her blog:
http://www.temlynwriting.com/blog/