ifting from one paradigm to another.  In order to reduce
the overall tension of uncertainty in a knowledge base, it is
often necessary to restructure our perspective on the data in
radical ways, to change the channel that parcels out information
to us.  But the true value of a new paradigm is typically not
appreciated from the standpoint of another model, that is, not
until it has had time to reorganize the knowledge base in ways
that demonstrate clear advantages to the community of inquiry
concerned.

The 