Okay, my turn.
Intelligence is the ability to learn by experience. I do believe that is the first requirement.
However, don't talk to me about LLMs or other AI bullshit. Those machines can only define statistical conclusions after having ingested massive amounts of data. A baby learns to talk by listening to its parents. There are no terabytes of data involved.
You can teach a human being to play chess. You can teach a computer to play chess. Computers today play chess very well. Take the same chess-playing computer and start playing poker and it will fall on its face. Take a human chess player and teach him to play poker, and he'll play.
Intelligence is also versatility. Adaptability. Computers, even with the AI moniker, are not adaptable. They do what their database has taught them. And if you teach them to recognise pictures of cats, then teach them poker, I shudder to imagine what bullshit will ensue when you ask them to qualify if a picture concerns cats, cats playing poker, or a game of poker.
Computers are constrained by what data they have on hand. Humans can infer things from their experience. A human being will be able to determine that is preferable to be nice to other people if one is to live in peace - a computer will have to have that data in its memory banks.Computers do not infer.
I don't know how to define intelligence. I do not have the arrogance to think that I can.
But I can tell when something is not intelligent.
Today's pseudo-AI is not intelligent.