Why is Fedora not a Free GNU/Linux distributions?

[Rahul Sundaram]

Anders Karlsson wrote:
> And any license that does not permit itself to be replaced or
> over-ruled by the GPL - is hence incompatible - even if it explicitly
> permits combination with the GPL for any derived work or combination
> work.
> 
> Am I understanding this right?

This part is incorrect. If has additional requirements but explicitly 
states that the combination is compatible with GPL, then it is. Affero 
GPL (AGPL) is a example of this.

http://www.fsf.org/licensing/licenses/agpl-3.0.html

"Notwithstanding any other provision of this License, you have 
permission to link or combine any covered work with a work licensed 
under version 3 of the GNU General Public License into a single combined 
work, and to convey the resulting work. The terms of this License will 
continue to apply to the part which is the covered work, but the work 
with which it is combined will remain governed by version 3 of the GNU 
General Public License."

Rahul