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Learning From Losing: What Sport Taught Me About Feedback
Losing at sport makes feedback feel less theoretical. There's a difference between a comment that helps with the next attempt and one that simply restates how badly the last one went.
I try to remember that in code review. Point to the specific problem, explain its effect and leave the person something they can act on. A long catalogue of faults isn't necessarily more useful than identifying the one thing worth working on next.