sentation (and therefore not in the 
&gt; real world
&gt; unless you are qualified to study advanced topics)
&gt; ---
&gt; 
&gt; Whatever you call it, there is something in the real world which
&gt; entails two things being related to each other in a particular way.
&gt; Take for exampl, being ciblings.  I'm sorry, but I can see no 
&gt; way round
&gt; ciblinghood being in the real world.  You can choose to call it a
&gt; relation, or a relationship, or a frobnit, but it is a real 
&gt; world notion,
&gt; w