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mk  ·  4674 days ago  ·  link  ·    ·  parent  ·  post: AskHubski: What are the top ten most positively influential events in human history?
I'd say it's somewhat rhetorical, but should we say that Calculus was invented or discovered? I'd say 'invented' as it didn't exist beforehand. The same with zero, I think. It's a conceptual tool that didn't pre-exist.