Multi-license - won't it conflict?

[Karl Fogel]

"M.I.Z Khalid" <itsols at gmail.com> writes:
>I'm a little concerned AND in doubt about how a SINGLE GPLe'd program
>can carry a COMMERCIAL license. My specific questions are:
>
>1. Where does it indicate in the GPL v3, that only the original
>copyright owner can issue a dual license?
>
>2. This may be answered above but if not, where does the GPL v3
>prevent a forked project or redistribution being issued ALONG with a
>commercial license BY A DEVELOPER, who is NOT the original copyright
>owner?

Someone who owns full copyright in a work (a program or anything else)
can relicense specific copies under any license(s) they want -- that's
what being the copyright owner means.  A person who *receives* a copy
can only redistribute under the terms of the license they received it
under, if they are not the copyright owner.

I am not a lawyer, and this is not legal advice, however.  It is simply
my lay person's understanding of the situation.

Best,
-Karl