You obviously have never done an IQ test. It does not test the amount of knowledge you retain. The last IQ I did (in South Africa) where I was given 5 or more hours to complete it (but finished it in 90 minutes).

It had drawings of little squiggly figures. Then it had three words, and then it asked me a question. When I eventually figured it out,

I went on to question 2. It was the same thing. A very simple drawing, 3 3 or 4-letter words, and a question. When I tried to answer it, I realized I needed information from the previous drawing. Only the laptop I was on wouldn't allow me to go back.

All the time I was doing the test, I had on EEG equipment to test what my brain was doing.

Then I moved on to the 3rd question, and again the small simple drawing, a few words - three or four letters each. All very, very simple. Again, I was asked a question, and again I had to remember everything previously accrued, and I couldn't go back.

At the end of 90 minutes, I was panicking, and I understood why they had given me 5 hours, and said I could have more time. As it happened, I clicked next, and that was the end of the test. The doctor was most surprised.

There was absolutely nothing in that test that required any other knowledge than year 2 reading and writing skills.

The test figured out whether you could figure out things or not. That is what an IQ test does.

Nobody said that IQ was a prediction of success. In every single instance I have been tested, it has been to find whether a lack of intellect was the problem in my not being able to do anything. They are used to determine where the issues are in the person's ability to carry out tasks, look after himself, cope with school work, or in some jobs, like computer programming, to figure out whether the person will be able to do it.

Give me an example of knowledge required to do an IQ test (America does not have them - I noticed when I lived there. Unless it's Mensa.)