The title is self evident, I wonder if anyone can tell me of ways or times when they or anyone else has learned from failure?

I am serious in this request, we hear a lot about learning from failure or learning from our mistakes but are these anything more than just platitudes or cliches?  Is it possible to learn from failure or is failure the opposite of learning?

Please, if you know of any examples of someone learning from failure I’d be very grateful if you could add a comment to this post about what or how they learned from that failure.

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