Idiot Savant

Every normal man, woman, and child is, then, a genius at something, as well as an idiot at something.

-- Charles Spearman (1863-1945), English psychologist and statistician, on his theory conceiving intelligence as made up of a "general factor" as well as "special factors" more specific to particular mental tasks, The Abilities of Man: Their Nature and Measurement (1927) p221