A sufficiently large program in [any language] is not readable as a description of its own behavior. I think it's easy to fall into the trap of thinking this i

A sufficiently large program in [any language] is not readable as a description of its own behavior. I think it's easy to fall into the trap of thinking this is not true for expressive languages like Ruby or Python, because there are precious few projects of sufficient complexity written in those languages. If you think I'm wrong, please show me the Ruby equivalent of an os kernel or Photoshop, and I'll reevaluate my thinking. More importantly, every program can be seen as, at some level, a description of its own behavior. But none contain a description of the system's intent. That's what specs are for.