Well, yeah. I mean, if you were to ask me before I'd heard about the IQ thing, I would have said the same. But new data caused me to reexamine my old assumption

Well, yeah. I mean, if you were to ask me before I'd heard about the IQ thing, I would have said the same. But new data caused me to reexamine my old assumptions -- why doesn't that work with everyone? An IQ that low doesn't imply what you think it does. It makes it hard for someone to handle life in a highly regimented society, where not knowing the difference between "Walk" and "Don't Walk" will get you killed in a week. But a person with an IQ of 50 will end up with the intelligence of a nine-year-old, and under some circumstances, you could expect a nine-year-old to, say, dress himself and forage for food.