nuous stuff, mereology is a better tool
than set theory, but it is just as extensional.  Whitehead's
definitions are intensional -- they are determined by the forms
of definiteness.  You have to recognize the forms if you want
to say why two things are the same by intension.  You can't
adequately capture intensional concepts in terms of purely
extensional things, such as sets or mereological fusions.

&gt;&gt;To summarise - I think the meanings of the E and P words are quite clear
&gt;and
&gt;
&gt;&gt;simpl