cal objects.
 
JA: The reason I say this is because the meanings of physical signs,
    that is, the sorts of signs that refer to physical objects and
    physical phenomena, are not determined solely by theories, as
    a large share of their meanings reside in the experiences of
    these objects and phenomena themselves.  Notice that there
    is a difference between being determined by a law, which
    we may not know well enough to be able to write down,
    and being determined by a theory, at least, 