But what separates people like this from becoming Einstein, I suspect, is no innate defect of brilliance. It’s things like “lack of an interesting problem”—or, to put the blame where it belongs, “failing to choose an important problem.” It is very easy to fail at this because of the cached thought problem: Tell people to choose an important problem and they will choose the first cache hit for “important problem” that pops into their heads, like “global warming” or “string theory.”