[Fedora-legal-list] FPCA question about 4d waiver limitation

[Bruno Wolff III]

On Mon, Apr 19, 2010 at 15:45:19 -0500,
  Bruno Wolff III <bruno at wolff.to> wrote:
> I am wondering why the promise to waive or not assert 4d is only for the
> Fedora community?
> ... "along with
> a waiver of the right to enforce, and an agreement not to assert,
> Section 4d of CC-BY-SA against the Fedora Community, to the fullest
> extent permitted by applicable law."
> 
> I would expect people downstream of Fedora to get the same rights as the
> Fedora Community?

I see reading further that "Fedora Community" seems to include downstream.

Is there any burden of proof issue where you would need to show you got the
contribution through Fedora and not by some other method?