Machine processing and human comprehension and reproduction of URIs are, however, not anthetical. Similarly, the "opacity by design" of URIs does not mean they must be overly complicated. On the contrary: well designed, user-friendly URIs can result in easier management and an increased readership.
Do not put too much meaning in a URI. as Berners-Lee writes, Designing mostly means leaving information out. If you put too much meaning, too much semantics in your URI, chances are your resource will evolve outside of the semantic frame, resulting in an unnecessary division of the resource or change of URI. Use simple URIs, easy to type, write down, spell, or at least easy to cut and paste. They are likely to be easy to be remember if you follow this rule.
Okay, I'm not going to let this topic slide that easily. Back to discussion... ;)