Getting an Erdős number of 1, 20 years after his death?<p>I feel compelled to post the relevant XKCD: <a href="https:&#x2F;&#x2F;xkcd.com&#x2F;599&#x2F;" rel="nofollow">https:&#x2F;&#x2F;xkcd.com&#x2F;599&#x2F;</a>