All an IQ tests, is your ability to do well on an IQ test.
It's not a particularly great measure of intelligence. The fact that you can often improve your IQ by 20 points (or more) just by practicing the types of questions that turn up should be evidence of this. Did you just become massively more intelligent relative to the population in the 2 days you spent practicing the questions?
Be fair; this is a correct comment, in line with the OP. Terman admited that IQ tests are only good at testing what is covered in the IQ test. A circular definition of IQ if there ever was one.
It's not a particularly great measure of intelligence. The fact that you can often improve your IQ by 20 points (or more) just by practicing the types of questions that turn up should be evidence of this. Did you just become massively more intelligent relative to the population in the 2 days you spent practicing the questions?