Because the numbers were so close, study author Jay Zagorsky put the results in context, saying, “I don’t think you can say with certainty that blondes are smarter than others, but you can definitely say they are not any dumber."
When speaking to Ohio State News, Zagorsky also mentioned that on average, blondes had access to the most reading material growing up, which would naturally shape their intelligence, saying, “If blondes have any slight advantage, it may simply be that they were more likely to grow up in homes with more intellectual stimulation.”
This is all to say blondes are far from dumb, and they have more fun. The latter point is based on Rod Stewart, not science. But Rod Stewart is basically science.