Given Sanders' repeated reference to himself as a "socialist," arguments over the definition of the word have become very vogue. I want to contribute a thought today about a wrong way to proceed. A Facebook friend of mine, who shall go nameless, wrote as follows: "I'd say Stop Signs are socialist. I'd define it very broadly." What he is saying is that any government as the term is usually understood is socialist, because such an institution collects money, at least some of it non-voluntary, and uses at least some of that money for non-controversial purposes such as putting stop signs up in places that help avoid collision and death. There are at least two purposes to which such an argument may be put: If I know that you agree that the word "socialism" names something bad, I may use something like this to push you toward anarchism. On the other hand, If I know that you believe in some sort of government or other, I may use the argument...