Bottom up thinkers try to start from experience and move from experience to understanding. They don't start with certain general principles they think beforehand are likely to be true they just hope to find out what reality is like.
My own experience is that a certain kind of genius among students is best brought out in bed.
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No one ever pretended that shopping for anything is a rational experience. If it were would there be Fluffernutter? Laceless sneakers? Porkpie hats? Would the Chia Pet even exist?