Blue–green distinction in language

In many languages, the colors described in English as "blue" and "green" are colexified, i.e., expressed using a single umbrella term. To render this ambiguous notion in English, linguists use the blend word grue, from green and blue, a term coined by the philosopher Nelson Goodman—with an unrelated meaning—in his 1955 Fact, Fiction, and Forecast to illustrate his "new riddle of induction".