> With interpreted and dynamically typed languages, you have to have 100% test coverage, because you have no idea if your code is even syntactically valid until

> With interpreted and dynamically typed languages, you have to have 100% test coverage, because you have no idea if your code is even syntactically valid until you run it, and of course if it isn't valid, then you throw an exception. I think you mean _semantically_ valid, e.g. no undefined variables. Most dynamic languages provide file-level syntax checking, rather than line-level. But I completely agree that this is the easiest argument against dynamic languages. Computers are better at bookkeeping than humans, and we should use them as such.