User blog comment:The Milkman/Twitter Responses: Bethesda Still Having Issues/@comment-71.83.170.64-20121008044800/@comment-3492791-20121009044838

"Bug-free" is not a realistic goal. Everyone knows that and nobody tries to do it. You QA the shit out of it to remove as many bugs as you can, then when it becomes acceptable they release it.

Now you have a QA group of X million(s) to find bugs for you. Then you release patches to fix them.