You've heard of immigration, right? They have a big 'problem' with that in California...
Yeah, but I don't think immigrants are nessecarilly stupid, or particularly enclined to participate in state/county wide IQ tests. true, although I would place deductive logic as a sub-class of intelligence.
Well I think the most credible theory is Howard Gardners "Multiple Intelligences" theory where deductive logic, is one *kind* of intelligenge (the Logical-mathematical). IQ tests also test some aspects of language, maths, shapes and other stuff too.
But they're still all logic puzzles, which is why Dr. Gardner suggests that traditional IQ testing is too limited to accurately portray intelligence. An 'idiot savant' for example would score rediculously high in an IQ test, but still be intellectually challenged.