Michael Hand's interesting analysis of the concept of intelligence crucially depends upon three assumptions: firstly, that there is an ordinary use of the term which, when applied to an individual is perfectly general and not context dependent. Secondly, that this use is best cashed in terms of aptitude. Thirdly, that the aptitude in question is to be explained in terms of theorizing. I shall argue in what follows that the first assumption may be true, but, if it is true, this presents a problem for Hand's analysis and not a path to a solution. That the second assumption is false but, even if it were true, it would sit badly with assumption one. And, finally, that the third assumption runs into too many difficulties to be acceptable.