98 DETERMINISM AND MATERIALISM
ically normal composition and other types of urine. De-
viation from the normal composition is accounted for by
certain deviations in the body's physique or in the func-
tioning of the body's organs from what is considered
normal and healthy. These deviations too follow a regu-
lar pattern. A definite abnormal or pathological state
of the body is reflected in a corresponding alteration of
the urine's chemical composition. The assimilation of
certain foodstuffs, beverages, and drugs brings about re-
lated phenomena in the urine's composition. With hale
people, those commonly called normal, urine is, within
certain narrow margins, of the same chemical nature.
It is different with thoughts and ideas. With them
there is no question of normalcy or of deviations from
normalcy following a definite pattern. Certain bodily
injuries or the assimilation of certain drugs and bever-
ages obstruct and trouble the mind's faculty to think.
But even these derangements are not uniform with
various people. Different people have different ideas,
and no materialist ever succeeded in tracing back these
differences to factors that could be described in terms of
physics, chemistry, or physiology. Any reference to the
natural sciences and to material factors they are dealing
with is vain when we ask why some people vote the Re-
publican and others the Democratic ticket.
Up to now at least the natural sciences have not suc-
ceeded in discovering any bodily or material traits to
whose presence or absence the content of ideas and
thoughts can be imputed. In fact, the problem of the
diversity of the content of ideas and thoughts does not
even arise in the natural sciences. They can deal only