While intrepidly exploring rec.food.drink.tea, Space Cowboy rolled
initiative and posted the following:

> Quips, quotes, catch phrases can be copyright in titles. The
> judge through out the Fox complaint about the Franklin title use
> of "Fair and Balanced" because it met the copyright test "common
> use". Titles become part of the public domain after they exceed
> copyright protection. The Potter franchise has sucessfully sued
> several people using their titles in knockoff publications.

By your own definition, then, "rosetta stone" is public domain.

--
Derek

There is no greater joy than soaring high on the wings of your
dreams, except maybe the joy of watching a dreamer who has nowhere
to land but in the ocean of reality.