[adameasterling]

I had to deal with this problem in our product, which has a visual programming language. I opted to throw an exception if, for whatever reason, "all()" receives an empty list! I had forgotten I'd done that. There's no explanation for it in the code.

As I sit here justifying my own reasoning, though, it sort of makes sense. For ordinary people (for whom this product is supposed to be for), I figure if they put in nothing, that was probably just a mistake.