^ It's far less abstract or philosophical, guys.
Whenever an ambiguous term like "intelligence" gets thrown around, suddenly people act as if it's something we can't define or that is wishy-washy. That's not the concern of IQ.
If you want to debate the more philosophical definition of intelligence, fine, but don't conflate that with IQ being
equally ambiguous in its definition as you are. IQ uses a very straightforward definition for its "intelligence" -- which may or may not be your laymen use of the word but it is properly defined nonetheless.
As I mentioned earlier, IQ essentially tests a kind of mental bandwidth. Think of it like teraflops:
Estimates say the human brain operates at about 1,000 teraflops or 1 exaflop, which is
100 times more than the best supercomputers atm.
But for example in the future an A.I. superintelligence may have an IQ of over 1,000 if their ability to process floating point operations increases beyond ours. What that means is they can think, process, hypothesize, mentally simulate (etc) things at far greater speeds and capacities than present humans can.
By that measure, it would be entirely possible to measure our IQ versus that of an alien species. Most likely theirs will be far higher than ours presently is.
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What causes some people to have more efficient cognitive processing than others is unknown, though signs point to biology. But what is verifiable is that there are indeed differences in the efficiency of people's cognitive processing of multi-variable problems.
And the more efficiency in processing they have, the more things they can (at least mentally) "do." How that translates into practical, real world success is a more complicated matter. Intellectuals have had it bad in certain periods of world history, other times it's better for them, depending on the social value places on those qualities.
The question of human worth is an ethical one, while the question of IQ is an more objective one. I agree that IQ =/= success, but it measures what it measures.