True, but there are exceptions. People who actually are above average intelligence are capable of making this claim as well, just because a lot of dumb people have the “You’re stupid because you don’t think like I do” mentality doesnt really change that.
Religion and politics are a prime example that separate the “Dumb people who think they’re smart” and the actual intelligent people. Good luck with that debate with a closed minded and unintelligent person, it’ll no doubt end with him calling you an idiot making wild unfounded claims, repeating the same thing over and over they’ve been “trained” to parrot back, and ignoring your actual facts.
So I agree, there are a lot of people who think they’re smart, but are actually morons. They roam through life assuming if you disagree with them, you’re obviously wrong. They never look for actual truths or answers, nor have the brainpower to understand them anyway. They just want what they want to be true, to be true, and that in itself is all the reason it must be true!
But, there is a very distinctive difference between dumb people who think they’re smarter than everyone and people who genuinely are just smarter, regardless of education levels.
Circling back on track; I think StumpyStrust’s example is best. Everyone has the ability to hone their skills and become better at anything, but some people have a much higher level cap than others. For example, someone with an IQ of 70 (legal retardation) but has a slight aptitude for algebra can still be better than his intellectual peers, but he’ll probably cap out before getting into College-Level stuff, or trig/calc. (We’re also not referencing idiot savants and certain autistic spectrums, we’re assuming generic retardation)
Now, that’s an extreme example, if we back peddle to thinking about the difference between say, someone with an IQ of 90 and someone with 110 who have the same aptitudes in the same areas, you will start to see a trend where the one with the 110 IQ who works just as hard as the one with 90 learning faster, and capping out a few levels above the other one. The guy with a 90 IQ is pretty much an average joe (IQs between 90 and 110 are all still in the “average range”). So he’s still a normal, every day functioning person. He probably isn’t even considered “stupid”. Just a person. But the guy with the 110 IQ still has a leg-up on him, assuming they both had the same natural aptitudes.