Fuzzy sets take into account the gray area of data under
consideration as opposed to a set being considered as
simply true or false. In other words, fuzzy sets
allow partial membership.
Example:
A person from Siberia considers
45 degrees a comfortable temperature
where as a person who lives
in Fiji would say this is freezing.
This example illustrates that the assignment of membership
in the set of warm people depends on who is determining what
is warm or cold.