Is it a serious question? IQ tries to quantify the positive correlation between the results of all intellectual tasks a person takes (AKA positive manifold).
replyWhatever the people who came up with IQ intended isn’t really relevant to the question of whether IQ measures intellect. At best is is loosely correlated. Very loosely.
replyOK. Demonstrate it. BTW, you can easily read critiques of "The mismeasure of Man" if you want to.
replyIQ strongly correlates with many real world outcomes that people tend to associate with being more "intellectual".
replyIQ has precise definition. It's what the tests measure. Intellect has only fuzzy handwavey definition. Correlation between IQ and intellect is about as loose as the definition of the intellect. The way people make the correlation even looser is by defining intellect in even more fuzzy and nebulous manner.