It is actually legitimately unclear what to expect of them these days. They can do some dazzling things, and fail miserably at others. The spectrum from “easy” to “hard” is not the same for our brains. And our brains mostly know when something is hard or we just can’t do it. Or at least we’ve had millennia to adapt to the way our brains are. They’re pretty idiosyncratic as well, and both marvelously clever and painfully stupid.