the word “impossible” had two usages: Mathematical proof of impossibility conditional on specified axioms; “I can’t see any way to do that.” Needless to say, all my own uses of the word “impossible” had been of the second type. Any time you don’t understand a domain, many problems in that domain will seem impossible because when you query your brain for a solution pathway, it will return null. But there are only mysterious questions, never mysterious answers. If you spend a year or two working on the domain, then, if you don’t get stuck in any blind alleys, and if you have the native ability
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