Release Message:  Why can induction be used to confirm that things are "green", but not to confirm that things are "grue"? Authored by Nelson Goodman.

Description:  Grue and Bleen Grue and bleen are predicates coined by Nelson Goodman in Fact, Fiction, and Forecast to illustrate "the new riddle of induction". These predicates are unusual because their application to things are time dependent. For Goodman they illustrate the problem of projectable predicates and ultimately, which empirical generalizations are law-like and which are not. Goodman's construction and use of grue and bleen illustrates how philosophers use simple examples in conceptual analysis.