ARC-AGI 2 is an IQ test. IQ tests have been shown over and over to have predictive power in humans. People who score well on them tend to be more successful
IQ tests only work if the participants haven't trained for them. If they do similar tests a few times in a row, scores increase a lot. Current LLMs are hyper-optimized for the particular types of puzzles contained in popular "benchmarks".
