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If you can easily frame a problem in a general form, it’s easy to find good insights. For example, specific difficult person in your life —> google “difficult people” The really hard problems are the ones that are hard/impossible to frame in more general terms.
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I think problems where a general case can be determined, but has not been extensively considered (perhaps due to occurring only once or twice a century) is another type of hard problem with no Google results.
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