We all do, from time to time. If you think you’ve found an error in my own writing, first read the “Commonly Made Suggestions” page, then follow the instructions on that page if you still think I need correcting. I’ve changed many aspects of these pages in response to such mail; even if I disagree with you, I try to do so politely. If you write me, please don’t call me “Brian.” My given name is Paul.