In my capacity as a professional writer and editor, I’ve learned that, for the most part, the rest of the world can be divided thus: (1) those who don’t particularly care about writing fundamentals, and (2) those who care just enough to cling tenaciously to fallacies such as the never-start-a-sentence-with-a-conjunction rule, which we’ve dealt with here and here.
For the latter group, Farhad Manjoo explains why you should never, ever use two spaces after a period.
