You can at least estimate some lower bounds on self-error, even if you can’t necessarily be certain of upper ones. That’s better than nothing, which is what you get if you don’t separate the probabilities.
For example my performance in test questions where I know the subject backwards and forwards isn’t 100%, because sometimes I misread the question, or have a brain fart while working out answers, and so on. On the other hand, most of these are localized errors. Given extra time, opportunity to check references, consult with other people, and so on, I can reduce these sorts of errors a great deal.
You can at least estimate some lower bounds on self-error, even if you can’t necessarily be certain of upper ones. That’s better than nothing, which is what you get if you don’t separate the probabilities.
For example my performance in test questions where I know the subject backwards and forwards isn’t 100%, because sometimes I misread the question, or have a brain fart while working out answers, and so on. On the other hand, most of these are localized errors. Given extra time, opportunity to check references, consult with other people, and so on, I can reduce these sorts of errors a great deal.
There is value in knowing this.