&quot; First of all, they wondered whether they were seeing the outcome of &quot;survivorship bias,&quot; [...] But that wasn&#x27;t what they found&quot;<p>And later<p>&quot;One explanation is survivorship bias&quot;<p>Can you pick one and stick to it?<p>Also, the confusion between &quot;count of PRs merged on GitHub&quot; and &quot;competent in software&quot; is not even obvious.