All adjectives may be divided into two types:
self-descriptive and non-self-descriptive.
Here are some self-descriptive adjectives:
English
short
polysyllabic
Here are some non-self-descriptive adjectives:
German
long
monosyllabic
So, to which type does the following adjective belong?
non-self-descriptive
If the word is really non-self-descriptive, then it applies to itself. But that would make it self-descriptive. And if it's self-descriptive, then it is describing itself as being non-self-descriptive.