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“When it comes to looking for new ideas in physics, there are, very broadly, two kinds of researchers. Imagine you’re walking home on a dark, moonless night when you realise that there’s a hole in your coat pocket through which your keys must have fallen at some point along your route. You know they have to be somewhere on the ground along the stretch of pavement you’ve just walked, so you retrace your steps. But do you only search the patches bathed in light beneath lampposts? After all, while these areas cover only a fraction of the pavement, at least you will see your keys if they are there. Or do you grope around in the dark stretches in between the pools of lamplight? Your keys may be more likely to be here, but”
― Jim Al-Khalili, The World According to Physics