system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Do IQ tests actually mean much? How accurate of measurement of one's intelligence are they?
gpt
They are fairly accurate in the sense that whatever they measure, they measure it consistently and it is reasonably correlated with true intelligence.  If you score well, you are smart, if you score poorly, you are either less smart, or you have a specific deficiency that makes it hard to take tests.

There is some evidence to suggest there is culture bias in how tests are written.  However, that does not completely invalidate them, it merely means the results are sometimes skewed against people not part of the dominant culture.