&gt; Can you give an example of a search where relevance doesn&#x27;t correlate with a common cultural sense of veracity?<p>If I search for &quot;Bob Smith&quot;, I&#x27;m not looking for &quot;pages with exclusively true statements about Bob Smith&quot;; I&#x27;m looking for &#x27;pages that mention the phrase &quot;Bob Smith&quot;&#x27;.  Perhaps someone mentioned a great story whose protagonist was named Bob Smith, and I wanted to find it.  Perhaps someone wrote an article entitled &#x27;Naming your programming language &quot;Go&quot; is like naming your kid &quot;Bob Smith&quot;&#x27;.  Perhaps I&#x27;m trying to find a comment on a news site that used &quot;Bob Smith&quot; as an example name.<p>If you run &quot;grep&quot; over a set of files, and one of the results makes you angry, do you blame grep, or whoever wrote the file grep found?  Does the answer somehow change if you use a more sophisticated search algorithm (e.g. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;tf–idf" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;tf–idf</a>)?