I misused some words but yes I was not totally wrong :D Thank you for
explaining me the rest I didn't had already understood.
Just one last question. I know how we can specify a licence for a software (I
already have done), but how can we do this for art ? For example, inside a
GPL project (game or software) what is the difference between "shareable" PNG
and a not "shareable" PNG ?
And as an entreprise, is it a good idea to allow users to "use" our logo ? I
mean, isn't this one of the main reasons that we don't have Firefox accepted
(beside the non-free addons) ? How Canonical "escapes" from this ?