>>12218618/sci/ has a lot of both of the smartest and dumbest people on 4chan. But even reddit has both way more people who are smarter than the smartest people here, and also generally a much higher average and median level of intelligence compared to here. I don't really know any imageboards that are smarter, but there's no shortage of forums, blogs,
>>12218750, and even some YouTube comment sections
Though if you use 4chan a lot it is nice to at least have a moderate chance of running into a few intelligent, non-underaged posters here (mixed in with the opposite), instead of what you have to deal with in almost every other board
