 And only if you're really convinced they're wrong are you supposed to rule against them in courts at any level. That's called Chevron deference. It applies to all agencies of the government. And people on the left, people who are advocates of big government, are absolutely livid. I can't convey to you how angry they are today that this new decision against the EPA could put Chevron at stake. They think their entire system of government that they've created over the last 50 years could collapse.