From personal experience, there are lots of dumb lawyers. When I say highly successful, I mean roughly the level of screening that occurs through promotion from fresh-out-of-academy lieutenant to colonel. For reference, Clarence Thomas easily clears the bar I'm trying to set, as did Johnny Cochran before he died. For entertainers, it seems clear that talent isn't correlated with intelligence. But I think staying power requires some, so the ultra-successful are candidates. For my broader argument, the categories I set out are potentially under-inclusive. There are lots of folks (like business people) not included in the categories I explicitly listed. We also haven't included any children, on the grounds that we don't agree on how to identify them.