[bijection]

These are both good examples of Goodheart's law — "When a measure becomes a target, it ceases to be a good measure."[1]

https://en.wikipedia.org/wiki/Goodhart%27s_law

[csours]

Thanks for that, I remembered that this was a "law", but I never remember the name, and whenever I try to tell anyone I get it wrong or express it in a confused manner.