Comment by fnfontana

Indeed. A person can be bad at math, but really good on play musical instruments or to guide himself through a unknown city. That requires a certain level of intelligence. But I think there's no human that is intelligent on every aspect, maybe some exceptions like Da Vinci, but most people are good at some tasks while other people doesn't. The human intelligence seems to be distributed throughout the population. This creates an illusion that human intelligence is general.