Is Linux Unix?

[John L Fjellstad <john-debian@fjellstad.org>]

I was wondering if Linux can be considered Unix?

Yes, I know Open Group owns the trademark for UNIX, and you have to be
certified to be able to call yourself UNIX.  I also know that no
original code of UNIX was ever in Linux or GNU.  

I guess what I'm asking is, has the "Unix" name become a generic term of
a family of OS, such that Linux can call itself Unix, or is Linux still
just Unix-like and merely a clone?

-- 
John L. Fjellstad
web: http://www.fjellstad.org/          Quis custodiet ipsos custodes