It's relative, to an extent, for me, just an inability to reason. I don't even care if we reach the same conclusions, but I honestly go around to highlighting people as dumb or smart based on that alone. To me, that speaks to fluid intelligence, someone being highly proficient in a field speaks to crystalized intelligence, most humans are capable of crystalized intelligence beyond what they could ever imagine, they just don't apply themselves, the fluid, that's much more complex.