opic or whatever may have some terrible
unsolved problem or difficulty associated with it.

<P>Thus the supreme concern of physics is no longer clear, the arch concern
of sociology is in dispute, the goal of psychology is in flux, the essential
nature or defining properties of life are unknown to the science of life
(or to biology), and even the basic object of study of mathematics (it
cannot be <U>number</U>, though the nature of number is an enigma in any
case), cosmology (what is the described or effable