The demographic information collected for the test is a proxy for culture, since we really don't have any idea. We just detected if individual test items were g

The demographic information collected for the test is a proxy for culture, since we really don't have any idea. We just detected if individual test items were gotten wrong substantially more often for any individual demographic categories. In the end it really doesn't matter why people got it wrong, just that statistically it's a strong sign it's a bad question. Yes, the tests help. But they just help you reach your maximum potential. You're not hacking the test, you're hacking yourself. You can get basic prep courses for not much money. Yes some people cannot afford that, but that is a problem with secondary education that test prep even exists. There is no way you can make a test that doesn't discriminate against people that don't get enough sleep or show up hung over or the person didn't figure out the basics of taking standardized tests through primary and secondary education.