I think artificial intelligence is possible and has already been done if we’re talking about cloning animals. The cloned animal has intelligence and is created through entirely artificial means, so why doesn’t this count as artificial intelligence? This means even the phrasing “artificial intelligence” is incomplete because when people say artificial intelligence, they’re not talking about brains artificially grown in vats but extremely advanced non-biological circuitry. I think it’s perfectly reasonable to be skeptical about circuitry artificial intelligence or even non-biological artificial intelligence. It’s not like there has been any major advancement in the field that has alleviated those skepticism. I believe there’s an ideological reason to tunnel vision on circuitry, that solving the problem of artificial intelligence through brains artificially grown in vats would be “cheating” somehow.