“In my opinion, it’s redundant to say that someone invented “the first practical X”—this is the same as saying they invented X. To invent something *is* to invent a practical version of that thing.” https://rootsofprogress.org/epistemic-standards-for-why-it-took-so-long …
Depends why the impractical version was impractical. If it was trivial to make it practical once e.g. some new material appeared, then I'd call the inventor of the impractical version the real inventor. Whereas I wouldn't call Leonardo the inventor of the helicopter.
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Why not ?
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