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I don't see how something like intentionally sharpening a stick would not be an innovation over occasionally finding one.



It may not have been intentional, it could have been someone rubbing it against a rock out of boardom or trying to start a fire with it then realising it was pointy. In that case it was a discovery, not an innovation.

We may have had a very suboptimal way of doing it for centuries while the process evolved. I'm sure a lot of people here have stories of their pets confusing cause and effect.




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