"Nonlinear" doesn't mean "curved." It means "everything else left after you take out the linear". That's a huge inifinity of possibilities.
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...90% of the time when people say "nonlinear" in everyday use, they seem to mean specifically either "exponential" or "non-sequential"...
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...this is actually pretty rational, since those are nonlinearities that cannot even be usefully bounded between linear approximations 🤔
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yes but they want to add some faux-precision to that thought. Otherwise other metaphors/words are more evocative
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similarly from "Complexity and the Economy" by Brian Arthur
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Showing my ignorance, sticking to 2D first, when you take away the things that are linear and the things that are curved, what's left?
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Actually nonlinear means exactly the same thing as curved.
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