Actually, even that is learned, it's just that most babies learn the key skills a week or two before birth and are able to move right to the application. Preemies often have trouble with putting "suck" and "swallow" together, so they need to be taught how to use a nipple.
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Files shouldn't require names, but they should accept them. After all, we're looking for good ways to describe the contents of a file, directory, or database entry. Sometimes a set of tags and associations is the way to go, but sometimes the name "2008 tax return" is a perfectly fine description. Data doesn't always need human organizing, but sometimes human organizing is useful.