> at any kind of scale half of them will be already fixed, misunderstandings, bad data in, Here you're referring to a class of bug reports that's uninteresting

> at any kind of scale half of them will be already fixed, misunderstandings, bad data in, Here you're referring to a class of bug reports that's uninteresting for this discussion, because they're invalid (i.e. they don't represent an actual bug). We're talking about valid bugs that have not been fixed. > or related to an unusual setup Unusual, but ostensibly supported? Then there exists a bug.