In his fantastic essay John Wilkins' Analytical Language, the Argentinian writer Jorge Luis Borges remarks on a classification of animals described in a certain Chinese encyclopedia, The Celestial Emporium of Benevolent Knowledge:

In those remote pages it is stated that animals can be divided into the following classes: (a) belonging to the Emperor; (b) embalmed; (c) trained; (d) sucking pigs; (e) mermaids; (f) fabulous; (g) stray dogs; (h) included in this classification; (i) with the vigorous movements of madmen; (j) innumerable; (k) drawn with a very fine camel hair brush; (l) etcetera; (m) having just broken a large vase; (n) looking from a distance like flies.

Borges thereby reminds us that not all taxonomies are meaningful.
- Richard P. Bentall. "Madness Explained: Psychosis and Human Nature"