If our language were ideal, it would exhibit a one-to-one correspondence between thought and word. For each possible thought, there would be one (but no more than one) matching word.
Borgmann, Dmitri A.
"The Esthetics of Synonymy,"
Word Ways: Vol. 9
, Article 17.
Available at: http://digitalcommons.butler.edu/wordways/vol9/iss2/17