http://gplv3.fsf.org/wiki/index.php/Compatible_licenses#GPLv3-incompatible_licenses

On Sun, Mar 30, 2008 at 4:21 PM, Loui <louipc.ist@gmail.com> wrote:
On Sun, 30 Mar 2008 17:58:20 +0300
"Roman Kyrylych" <roman.kyrylych@gmail.com> wrote:

> 2008/3/30, Loui <louipc.ist@gmail.com>:
> > I don't like all these "this version or later" boondongles.
> >  Why don't we just keep things KISS and let people explicitly state what
> >  licenses are permissable. GPL1, GPL2, GPL3. Put one, or more of those
> >  in your licenses array and it's crystal clear what you mean.
>
> GPL2 "or, at your opinion, any later version" is not the same as GPL2
> only + GPL3 or later. ;)
>

Can you explain why they are not the same? I don't quite
understand why that doesn't work. Thanks.
http://gplv3.fsf.org/wiki/index.php/Compatible_licenses#GPLv3-incompatible_licenses