ified in
inferring that, since the phenomena are different, there must be two
kinds of underlying substances to which the phenomena are referred.
Thus, he may distinguish between the two substances and their
manifestations, as some monists distinguish between the one substance
and its manifestations.

(2) Or he may conclude that it is futile to search for substances or
realities of any sort _behind_ phenomena, arguing that such realities
are never revealed in experience, and that no sound reason for their
assumption can be adduced. In this case, he may try to make plain what
mind and matter are, by simply analyzing our experiences of mind and
matter and coming to a clearer comprehension of their nature.

As the reader has probably remarked, the philosophy presented in the
earlier chapters of this book (Chapters III to XI) is _dualistic_ as
well as _realistic_. That is to say, it refuses to rub out the
distinction between physical phenomena and mental phenomena, either by
dissolving the material world into ideas; by calling ideas secretions
or functions of the brain; or by declaring them one in a fictitious
entity behind the veil and not supposed to be exactly identical with
either. And as it teaches that the only reality that it means anything
to talk about must be found in experience, it is a dualism of the type
described in the paragraph which immediately precedes.

Such a philosophy does not seem to do violence to the common experience
of minds and of physical things shared by us all, whether we are
philosophers or are not. It only tries to make clear what we all know
dimly and vaguely. This is, I think, a point in its favor. However,
men of great ability and of much learning have inclined to doctrines
very different; and we have no right to make up our minds on such a
subject as this without trying to give them an attentive and an
impartial hearing.

59. SINGULARISM AND PLURALISM.--There are those who apply to the
various forms of monism the title _Singularism_, and who contrast with
this _Pluralism_, a word which is meant to cover the various doctrines
which maintain that there is more than one ultimate principle or being
in the universe.

It is argued that we should have some word under which we may bring
such a doctrine, for example, as that of the Greek philosopher
Empedocles (born about 490 B.C.). This thinker made earth, water,
fire, and air the four material principles or "roots" of things. He