First historian: &quot;Let&#x27;s talk about what happened.&quot;<p>Next gen historian: &quot;Let&#x27;s talk about who talked about what happened.&quot;<p>Third gen historian: &quot;Let&#x27;s talk about how those who talked about talking about what&#x27;s happened talked about it.&quot;<p>It&#x27;s like they&#x27;re discovering recursion one generation at a time.