ch, or of a 4-d approach, or of some other approach 
&gt; - which are the 'concepts that we will admit to our ontology', not 
&gt; everyday things.
&gt; 
&gt; Let me see if I can make the point with an analogy. Matthew and Chris 
&gt; P. and myself are like carpenters arguing about whether to use oak, 
&gt; ash or elm for the legs of chairs, and you are telling us that what 
&gt; we need are legs. Its not that you are wrong, exactly; but why are 
&gt; you in the carpenter's shop?

I think you have a point h