 situation" where
&gt; &gt;making vague concepts precise is beneficial.
&gt; 
&gt; I deeply disagree. If you read almost any technical manual, listen to
&gt; the ways people talk when teaching each other, and so on, you will
&gt; find 'vague' concepts. In fact I would go so far as to claim that
&gt; virtually *all* the concepts that people use in ordinary everyday
&gt; discourse are 'vague' in this sense. Concepts like 'person' and
&gt; 'bowl' and 'board' and 'table' don't have sharp definitional
&gt; bound