[deltaninenine]

The problem is this type of intelligence is hard to define or quantify. Its like asking the question " what is art and what is not art".

Data driven hiring practices require hard definitions. One of these hard definition of intelligence is IQ. IQ is very correlated with job success and also various other skill sets related to job success.

From the company perspective, successful hiring using a data driven scientific approach is the right call simply because its the best metric we have on intelligence.

Obviously their are aspects to intelligence that currently aren't quantified but is it wise for a company to bet their future on gut feelings that are subject to bias and aspects of intelligence not in the realm of science?

Unfortunately no.

I'm pretty sure the Google interview process is somewhat of a data driven process but I can't be sure. Are any googlers in the know? Are specific interview question and answer pairs measured and correlated with the success of the employee? Or is it all qualitative judgement?

IQ, I believe, is actually not legal to measure for an occupation. But we know that this is the metric that faangs are actually attempting to replicate.