Megan McArdle: 12 rules for free speech

If you write a column about athletes kneeling during the national anthem, you can expect to find yourself rapidly mired in debates about free speech. Because speech is (we lightheartedly hope) nuanced and complex, there will always be an element of “I know it when I see it” in placing cases into “protected” or “unprotected” categories. Which means we could spend the rest of our lives arguing about just what free speech means — and, frankly, we probably w