You probably didn't want to come across this way, but we should note that the absence of a better metric is not by itself a reason to use a bad one. If a metri

You probably didn't want to come across this way, but we should note that the absence of a better metric is not by itself a reason to use a bad one. If a metric is sufficiently decorrelated with the thing we want to measure, it should be ignored altogether, regardless of whether we have anything better.