The discovery of the planet Pluto in 1930 illustrates the relationship between metaphysics and the language arts. The planet Pluto had been a real entity, traveling in its orbit about our sun, for centuries; its discovery in 1930 did not creat e it. By being discovered, however, it became in 1930 for the first time a logical entity. When it was named Pluto, it became a grammatical entity. When by its name knowledge of it was communicated to others through the spoken word and also through the written word, the planet Pluto became a rhetorical entit y