Yes. But saying "code unit" makes it seem reasonable to read a module or package (or whatever it's called in your language). Ideally you want to just read a f

Yes. But saying "code unit" makes it seem reasonable to read a module or package (or whatever it's called in your language). Ideally you want to just read a few lines of code and say yes-or-no. Any need to read more should be because of genuine big picture stuff. For example: Good: Yes, these five lines of code correctly parse the `fooTarget` flag, but I need to read more to understand if fooTarget is the right thing to parse. Bad: Ok, we are parsing the `fooTarget` flag, but these five lines will only work right if the current locale has certain properties, is the locale somehow guaranteed at this point?