We want to at least distinguish between

• success at practical projects that involve planning over several tasks related by a dependence graph, possibly branching or looping

• talent in some particular domain (e.g. writing fiction, sleuthing, managing people, math, word puzzles)

• skill at memorization, accumulation of theoretical knowledge

• adopting behaviors which enhance or preserve your long-term prospects

Someone lacking the first would be called stupid, someone lacking the last would be called crazy (though we also use the term for mental illnesses, which are a different thing again).

Intelligence seems to be at least somewhat modular (idiot savants being the canonical demonstration). I wonder if there is some classification of biases by which parts of intelligence are affected.