If that's the definition of an error it proves my point That's the most subjective definition possible.
If Rob Mackowiak takes a horrible path to a gapper and ends up 3 feet from catching it, currently, that is not an error. It was a terrible play, but not an "error".
The whole "error" as defensive measure is stupid. Sure, I'm not going to sit here and argue errors are a good thing, it's just silly though to use them as any sort of measure of defensive play, when much better measures exist.
Crede should have made that play, this we are in agreement about. I disagree with everhthing else you've said.