What I mean when I think intelligence:

• knowledge accumulation

  • wide knowledge
  • precise knowledge

• avoiding cognitive-biases

  • avoiding a whole plethora of distortions like: my-side bias, confirmation bias, availability bias

• complex pattern matching

  • being able to see complex interactions between knowledge areas
  • this cause a good judgment
  • this is caused by logical clarity

• Intelligence conventional understanding

the correlation between most intellectual abilities, while positive, is only about 0.2 - 0.4 via Scott Alexander link