RE: OWL 2.0 ...

Hi Jeff,
 
Your question: 
"Do concepts (book, table, tree, etc.) even exist *inside* our mind?" 
is answered by your referred professor Murphy: 
"If we have formed a concept (a mental representation) corresponding to that
category (the class of objects in the world), then the concept will help us
understand and respond appropriately to a new entity in that category.
Concepts are a kind of mental glue, then, in that they tie our past
experiences to our present interactions with the world, and because the
concepts themselves are connected to our larger knowledge structures."

The essence of the (earth's) North Pole is that it is a location on our
globe that, according http://en.wikipedia.org/wiki/North_Pole (just to
mention a source) complies with one of the four definitions given there:

QUOTE

The North Pole, the northernmost point on the Earth, can be defined in four
different ways. Only the first two definitions are commonly used. However it
is defined, the North Pole lies in the Arctic Ocean.

*	The Geographic North Pole, also known as True North, is
approximately the northern point at which the Earth's axis of rotation meets
the surface.
*	The Magnetic North Pole is the northern point at which the
geomagnetic field points vertically, i.e. the dip is 90°. 
*	The Geomagnetic North Pole is the northern pole of the Earth's
geomagnetic field's dipole moment. 
*	The Northern Pole of Inaccessibility is defined as the point in the
Arctic farthest from any coastline, and is at 84°03' N 174°51' W

UNQUOTE
 
The remainder of your comments I consider playing with words. When inclined
to do that, try to visualize having to say what you want to say in Spanish
(the authors of the book) or Dutch (in my case).
 
Regards,
Hans
 
____________________________
Hans Teijgeler
co-author of ISO 15926-2 <http://www.infowebml.ws/ECM4.5/ECM4.5.html> 
author of ISO 15926-7
website www.InfowebML.ws <http://www.infowebml.ws/> 
e-mail hans.teijgeler@quicknet.nl
phone +31-72-509 2005