(Another shameless plug for someone else)
Mike Peterson is a journalist who writes a blog named Comic Strip of the Day. Usually he uses comics as starters for political and social commentary. (Mike, if you see this, I hope you think that’s a fair description.) I frequently use comics too, but to make points about grammar and writing, mostly expository writing.
This time he started with a Non Sequitur comic that fits well here (see below) and he writes about grammar! Go read the whole post; it’s good, though I don’t know the rule he refers to regarding “may” and “might.”
Here’s the comic: