Well, in theory anyone can avoid bugs. It's just really costly and requires a very structured approach to doing anything. It's very unlikely, however, that you

Well, in theory anyone can avoid bugs. It's just really costly and requires a very structured approach to doing anything. It's very unlikely, however, that you figure out every single combination of variables while writing tests. So, so in practice, I don't think it's possible to avoid bugs, unless you have a really tiny code base, maybe.