Obviously, Newton and Leibniz and many other Mathematicians (and other people) understood the chain rule before back propagation. But unfortunately I am very far from a Newton or Leibniz, so it took me a lot longer to grasp why the chain rule is the way it is. And back propagation just made it click for me. I was really just talking about me personally.

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cutlilacs 2 days ago | parent [-]

What insight did you gain from back propagation that you didn't have from just the formula of the chain rule?

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_fizz_buzz_ 2 days ago | parent [-]

What clicked for me was drawing the chain rule as a graph. When I was in school I just applied the chain rule without thinking about it. I really didn't mean this to be some deep insight or anything. Just an anecdotal comment.

	▲	cutlilacs 6 hours ago \| parent [-]
		Ah makes sense, I was thinking there was some deeper insight I was missing. Thanks!