... someday. I know (or at least hope) you don't want to, but you will. And then nobody will be able to ask you any more questions about your code. When people come to you and ask you questions about your code, critically think to yourself: If I had been run over by a bus yesterday, would this person be in trouble? Do I care about this person or what they are doing? If your answer to both questions is yes, go and document your code!
Dead Code
