I agree with you, but you&#x27;re being argumentative. No one here is saying that we should stop unit tests because they can&#x27;t find <i>all</i> the bugs.<p>Instead, the focus should be on what <i>else</i> we can do to improve the bug detection rate. This is an area that needs further research (and I would start with the observation that the quality of the unit test varies dramatically depending on who writes them).