&gt; For example, something as simple as: What is more blue? The sky or a lake?<p>I&#x27;m not Blake but I actually can&#x27;t answer that question. I&#x27;d have to ask you <i>what</i> lake and <i>what</i> sky. I&#x27;ve stored some notion of color values for ex. a &quot;stormy&quot; sky and could probably compare that to the color value I have stored for the lake near my childhood home.<p>The abstract concepts of &quot;sky&quot; and &quot;lake&quot; don&#x27;t have any color to me though. If you asked me to imagine a plane flying through the sky, the sky wouldn&#x27;t have a color.