Illustrate the classical theory of categorization.

Illustrate the classical theory of categorization.
【正确答案】：The traditional view of categorization is shaped by the classical theory that goes back to Aristotle. According to this theory, a category is defined by a set of necessary conditions, which together are sufficient. For example, if we assume that the category BACHELOR is defined by the four conditions of being human, male, adult and unmarried, each one is necessary. If someone is not human, male, adult or unmarried, he is not a bachelor. On the other hand, the condition of being human, male, adult and unmarried is sufficient for membership in the category BACHELOR. It does not matter what other conditions someone or something may fulfill. Being a bachelor or not depends on these four conditions.
The classical theory of categorization can be characterized by the following points:
(i)
Categorization depends on a fixed set of conditions of features.
(ii)
Each condition is absolutely necessary.
(iii)
The conditions are binary(yes-or-no).
(iv)
Categories have clear boundaries.
(v)
All members of a category are of equal status.