There are quite a few individuals that react to the idea of qualitatively smarter-than-human intelligence, AI or otherwise, with extreme skepticism and derision. My guess is that there are four possible reasons for this, which different people display in different combinations and intensity levels.

The first is the folk theory that intelligence is a light bulb - either it’s on, or it’s off. No in between. If you have it, it only varies to a matter of degree, not qualitatively. Humans have intelligence and animals don’t, which is why it’s okay to raise animals for food, for instance. Intelligence and subjective consciousness go hand in hand.

The second is the argument from divine privilege. Man, being made in God’s image, has been given the gift of reason. We cannot magnify this gift on our own any more than we can engineer a machine that turns us into angels. This “gift of reason” argument is what I was taught by my parents as a child.

The third is technological skepticism. For example, my grandfather, who is an atheist, believes it will be centuries before we understand the brain in enough detail to manipulate it significantly. This skepticism derives partially from a linear intuitive view of technological progress, and partly from a pseudo-spiritual worship of brain complexity.

The fourth is outright denial based on fear. Some people associate superintelligence with heartlessness, boring rationality, ruining all the fun, threatening to replace us, and so on. This is primarily based on fictional portrayals. There are dozens of films and books in which superintelligences are the bad guys. Astonishingly, the dumber good guys always seem to triumph in the end.

Can you think of any others?