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> mass appeal might go down

I don't think Fermi questions have mass appeal anyway. I don't think most people know what "order of magnitude" means, let alone understand dimensional analysis (ie., the conceptual idea of what it means for units to cancel).

I don't think making the game a little more complex would really affect its appeal, because it's already targeted at people with a certain level of scientific understanding.

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Good call. It easy to forget that the world isn't as nerdy as me lol. This would definitely let me focus the game a lot better anyway.

OTOH, not so long ago, a colleague and I tried to guess the number of piano tuners in large cities, e.g. New York. I find your idea nice, but the execution could be more flexible, more puzzle-like. E.g., you could have units (like #passengers, #planes, #flights, time), and the user can create factors out of those.

But I'm afraid that it'll lose its appeal after a while. These problems seem same-y to me, more so than Wordle.

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