In programming, there's a concept of quine -- a program that prints its source code (wiki). I'm not obsessed with the concept, but it is fun sometimes.
Recently I saw this Dilbert comic, and It made me think about a funny thing.
"Oh, okay. It will cost you 50$", might the lady engineer have said, and written the following program:
Requirements that require a complying program to print themselves? Sounds like a software engineering quine, doesn't it?