PPT Slide
We intuit things by mentally comparing them with what we have already learned. You instantly intuit how to work a wastebasket icon because you once invested the effort to learn how to work a real wastebasket, preparing your mind to make the connection years later. But you didn't intuit how to use the original wastebasket. It was just extremely easy to learn.
Which brings us to the idiomatic paradigm, which is based on the fact that the human mind is an incredibly powerful learning machine, and that learning isn't hard for us.
Alan Cooper: The Myth of metaphor