After a point, say 130 IQ, the differences between people's capacity become intangible. But there is certainly a big difference between someone under 80 IQ and

After a point, say 130 IQ, the differences between people's capacity become intangible. But there is certainly a big difference between someone under 80 IQ and someone with 130 IQ, which is why the US military doesn't even accept individuals under 80 IQ.