Non functional requirements

This is kind of a strange one if you think about the name. I mean, why would you want the software to be non functional?

Of course we know what non functional requirements are. That is stuff that an end user or even tester cannot verify directly by using the system. Such as "all code is reviewed", "JSF will be used to generate the GUI web pages", "database access will be through stored procedures", "development will follow the S methodology". Stuff like that. But if you look at the name itself in isolation it's kind of funny.