[erasemus]

I like his argument in the middle section of howcome IQ predicts income or social status despite the fact that general intelligence doesn't exist.

It seems to me that the categories of 'knowledge' and 'creativity' are more fruitful. For example, his idea that intelligence is 'situational' reflects the fact that people know more about some topics than others, and also that our environment contains knowledge (e.g. a machine embodies knowledge put there by the designers that the machine operator doesn't have).