>To define an elephant is not usually to distinguish it from quasars and
>English muffins, though the act of definition, by definition, has the
>side-effect of excluding it from those and all other non-elephant classes.
IAN: Is the exclusion of the area around this
letter A a "side-effect" of the identity of its
interior or is it THE effect of its interior?
In other words, is exclusion a lesser charact-
eristic of identity, or are both inclusion
and exclusion equal characteristics?
>`A' can be divided from `non-A'.
IAN: Can inclusion in subset A be separated
from the process of exclusion from A? I would
say that the process of inclusion into A is
the process of exclusion from A. To say A
is bright is to exclude dark from A.
Is there any positive feature of A that does
not simultaneously define exclusion from A?
If not, then A defines the union of A and -A.
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