Problem Solving, SI Style

摘要

AN OLD JOKE goes like this. Late one night, there's a guy down on his hands and knees outside on a street corner, looking around. Another fellow comes up to him and asks him what he's doing. The first man says, "I dropped my car keys and I can't get home unless I find them."The other fellow says, "I'll help you look." They're both on their hands and knees hunting around for a few minutes when the Good Samaritan pauses, then says, "I can't find them anywhere. Where did you drop them?"The first guy looks up, pointing way down the street and says, "Over there."The second guy says, "If you dropped them over there, why are you looking here?" The first guy replies, "Because the light's better over here."This story, unfortunately, mirrors the approach of