Animal taxonomy is complicated, but if somebody says &quot;bats are bugs&quot; [1] it&#x27;s fair to guess that they don&#x27;t know much.<p>Try it yourself. Take any complicated domain that you know well. It&#x27;s pretty easy to construct statements that make it clear that a speaker wouldn&#x27;t know much.<p>[1] <a href="http:&#x2F;&#x2F;www.gocomics.com&#x2F;calvinandhobbes&#x2F;1989&#x2F;11&#x2F;03" rel="nofollow">http:&#x2F;&#x2F;www.gocomics.com&#x2F;calvinandhobbes&#x2F;1989&#x2F;11&#x2F;03</a>