674
xkcd #2899: Goodhart's Law
(imgs.xkcd.com)
Alt text:
[later] I'm pleased to report we're now identifying and replacing hundreds of outdated metrics per hour.
We don't test for false convictions, which are as good as true ones for furthering careers in prosecution and law enforcement.
We don't know if our prison population is 10% innocent or 75% despite Blackstone's ratio.
In fact, when someone isn't successfully convicted, it's assumed the suspect got off on a technicality rather than continuing the investigation to find other suspects.