Bleen

A term coined in conjunction with the term "grue" by Nelson Goodman to illustrate the problem of induction.

In this context, bleen means "blue if observed before a time t, and green if observed after," whereas grue is the other way around.

You cannot prove inductively that all sapphires are blue; you can only say that they are bleen.

by Jazzercise February 17, 2009