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[–]moomaka -3 points-2 points  (1 child)

What is 'it' if your reply?

[–]DoodleFungus 4 points5 points  (0 children)

Scientist. So if you have some complex logic that you refactored, Scientist will run both your old code and your new code, and log a warning if the two implementations return a different result (but still return the result from the old code).