Vocabulary has absolutely zero correlation to intelligence. Vocabulary is knowledge and knowledge is gained over time. He also doesn't seem to know the difference between smart and intelligent. Smart has to do with the knowledge of the person, while intelligence is something you're born with and cannot be changed. Intelligence is not the knowledge of a person, but rather their imagination. (Also their flexibility and their ability to change). <br><br>On the other hand, the schooling system dilutes intelligence or in another way conceals your imagination, putting it tucked away in a box. It is a place where success depends on memorization and obeying authority.,(reply>), @tamir They do test this via split-half reliability and a true zero, i.e. they know how many words there are and how many does each level know. That's why I'm talking Dunning-Kruger, those test companies can't afford to do nonsense, else they'd be out of business soon.,(reply>), @nehorlavazapalka ok so do you think an IQ test should include for example: floccinaucinihilipilification, what does this word mean? And if you don't know it's meaning you're granted to be less intelligent? No. I don't believe so. (The word means estimating something as worthless). Just like knowing that word.,(reply>), Dunning-Kruger at work again. Vocab is the most heritable, most g-loaded subtest of them all. Twins separated at birth are most alike in how many words they remember. Turns out it's not what you've been exposed to but how much you remember and how quick/precise your inner voice is. You can feel it when studying  a new language, how many times do you pick up a word at the first time? Almost never. But some people do.