🚀 go-pugleaf

In article <1992Nov4.184630.3575@hubcap.clemson.edu> steve@hubcap.clemson.edu ("Steve" Stevenson) writes:
>skumar@eagle.wesleyan.edu writes:
>
>>Please correct me if I am wrong but I think that if I found a creature which
>>was like a crow in all respects but it was white in color, I would call it an
>>albino crow or something. I would not call it just "a crow". Does this not mean
>>that we accept "all crows are black" by definition so we need not prove it?
>
>Isn't this the "grue" problem? The "grue" problem came about (if I remember
>correctly) because all emeralds were green and believed by reputable scientists
>that they could only be green. Then they found blue ones...
>
>-- 
>===============================================================================
>Steve (really "D. E.") Stevenson           steve@hubcap.clemson.edu
>Department of Computer Science,            (803)656-5880.mabell
>Clemson University, Clemson, SC 29634-1906

`Grue' was an invented word by Nelson Goodman; something is grue if it is
green before 1 January 2000 and blue thereafter; therefore every confirmation
of the sentence `all Xs are green' is also a confirmation of the
sentence `all Xs are grue' (before 2000).