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[quote user="John WR"]But I imagine a lot of things that we consider "invented" actually began when someone noticed a natural phenomena like wheels being guided by ruts and realized this could be put to good use. John[/quote] Yes, when I say the railroad principle was invented by accident once ruts were worn into the road, I must qualify the term, “invented.”  More accurately the principle was created because technically you need a purpose for an idea in order for it to be an invention.  An invention needs claims, and claims must address a purpose.  But when the railroad concept was created with the ruts, it was by accident, and so by definition, it had no purpose.   Indeed, they were probably trying to invent something to fill in the ruts.
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