Imagination and diversity of experience are some other factors. I.e., the ability to imagine new combinations of disparate ideas, gained through a variety of u

Imagination and diversity of experience are some other factors. I.e., the ability to imagine new combinations of disparate ideas, gained through a variety of unique experiences. You could argue Einstein's imagination, coupled with his scientific intelligence, is what made him brilliant. But like others have said, the essay reads like there is a linear and narrow definition of "smart." But having followed pg on twitter, he seems to tend towards an Ayn Rand style worldview, so I guess I'm not surprised.