1. All languages contain terms for white and black.

2. If a language contains three terms, then it contains a term for red.

3. If a language contains four terms, then it contains a term for either green or yellow (but not both).

4. If a language contains five terms, then it contains terms for both green and yellow.

5. If a language contains six terms, then it contains a term for blue.

6. If a language contains seven terms, then it contains a term for brown.

March 21, 2009

Language terms of colors follow surprisingly consistent patterns