  To what extent can our limited set of observations be used to pin down the
specifics of a ``Theory of Everything''? In the limit where the links are
arbitrarily tenuous, a ``Theory of Everything'' might become a ``Theory of
Anything''. A clear understanding of what we can and can not expect to learn
about the universe is particularly important in the field of particle
cosmology. The aim of this article is to draw attention to some key issues
which arise in this context, in the hopes of fostering further discussion. In
particular, I explore the idea that a variety of different inflaton potentials
may contribute to worlds ``like ours''. A careful examination of the
conditional probability questions we can ask might give a physical measure of
what is ``natural'' for an inflation potential which is quite different from
those previously used.
