A software engineer walks into a bar. He sits down and sees the bartender yelling at the computer when trying to process a customer's order. "Why are you yelling at the computer?" the engineer asks. "Nothing is working! The software on the computer is riddled with bugs!" responds the bartender. The engineer takes a look at the computer and notices the software it is running was actually written by himself a few years earlier. Immediately, he gets offended. "Those aren't bugs!" the engineer yelled. "Those are alternative features!"