Are we sure there is some objective, technical definition of what is intelligence and what is not?

Isn't it rather a subjective philosophical concept? What if human intelligence is also a statistical model, trained by evolution to make decisions that lead to offspring?

The one major difference I see between AI and people is the ability to learn and memorize. All memory/learning solutions that current AI architectures offer just feel like workarounds and simply don't work anywhere near as a person learning something new and remembering it.