Hey! This occurred to me in a conversation with a friend, so nothing overly serious. Suppose that through some means, for example a surgery, we could amplify the intelligence of people without altering the memories they accumulated throughout life, including how fast things proceed, like how fast someone talks to them or how fast they go through a math textbook. So we administer Bob an IQ test and he scores 100 Then we perform the surgery on Bob. We test Bob again and he scores 200 We observe Bob for a year, and he seems to be learning everything faster than before. He becomes a great chess player, he learns a whole new language within months and finds college mathematics to be a joke. So, and in accordance with his last score, it's safe to assume that he's indeed more intelligent and the surgery worked. To the observers, he seems to be getting things done much faster. But what about his point of view? Since Bob has retained his memories before the surgery, does he feel his thought is faster than before, or does he feel the world around him going slower? The real question behind this thought experiment is how does our subjective perception of time correlate with intelligence and if there is any way to know that.