Abstract

The 
senses,
 or
 sensory 
modalities,
 constitute 
the
different 
ways
 we
 have
 of
 perceiving 
the 
world,
such
 as 
seeing,
 hearing ,
touching, 
tasting, 
and
smelling.
 But
 what 
makes 
the 
senses 
different?
How 
many
 senses
 are 
there? 
How 
many 
could
 there
 be?
 Wha t
interaction
 takes
 place 
between
the
 senses?
 This 
introduction 
is
 a 
guide 
to
thinking 
about 
these 
questions.