Completely depends on how much you've "mixed in", and facts specific to that individual work.
Fair use doesn't get thrown out the window because GPL authors have a certain worldview.
Second, there are a lot of non-copyrightable components to source code - if you can't copyright it - you certainly can't GPL it. These can be copied freely by anyone at any time.
Fair use doesn't get thrown out the window because GPL authors have a certain worldview.
Second, there are a lot of non-copyrightable components to source code - if you can't copyright it - you certainly can't GPL it. These can be copied freely by anyone at any time.