This is the kind of thing where everything is a judgement call and arbitrary policies applied strictly become absurd and useless. It's very possible that this

This is the kind of thing where everything is a judgement call and arbitrary policies applied strictly become absurd and useless. It's very possible that this particular team could stand to put a higher priority on fixing bugs before implementing new features. That's ultimately going to be what it is, no matter what they call it. They are free to call it "Zero Bug Tolerance" as long as everybody understands that it's hyperbole and they don't get into endless bikeshedding on what constitutes a bug and if they really should fix it. It's pretty obvious there will eventually be a bug that's too rare and weird to really troubleshoot, or too niche and complex to bother fixing, or more trouble than it's worth.