Thomas Nagel on Philosophical Ability

“[S]heer brains—I.Q., logical speed, raw mental muscle—play a powerful role, even though they are not the same thing as philosophical ability. Philosophy is like basketball: being preternaturally tall doesn’t ensure that you’ll be a good basketball player, but it helps an awful lot, and in philosophy it helps to be supersmart. Such people can simply travel farther and faster than the rest of us, and I wish philosophy attracted more of them. But the effects of this sort of intelligence are complex: sometimes, if all that power is put to the service of harebrained intuitions, it yields logically dazzling but implausible results. Even when it goes off the rails, though, brilliance generates structures of thought that command attention and have a life of their own, and their impact on the field doesn’t depend on whether anyone thinks they’re right. This can be a nuisance, but I suppose the devaluation of plausibility is unavoidable in a field so dominated by argument.”
 
--- Thomas Nagel, Other Minds: Critical Essays 1969-1994