Discussion of stupidity and intelligence is apt to carry by implication the assumption that there is such a thing as "general intelligence" (as measured by I.Q. tests), what the psychologists who invented it a century ago called _g_. There is no such thing. It isn't just that I.Q. tests don't give an accurate measure of g; it is that there is no such thing to measure. See Stephen J. Gould, _The Mismeasure of Man_. Carrol