The FSF _requires_ copyright assignments for works to be incoperated into a GNU project (not all, but most). If it cannot get a copyright assignment for a change, the change isn't incoperated.
Never mind that Alessandro's and my examples specifically involved the change *not* being incorporated into the original project.
Nothing stops anyone from incoperating the changes into a project which isn't the original one.
Let's say I write a shoot-em-up game, where you're shooting aliens (similar to, say, Doom). I release that under GPL.
Now, someone else comes along and changes the game (which they're perfectly entitled to do under GPL, obviously). Instead of shooting at aliens, you're now shooting Shia Muslims, as an example.
They had to add new material to do this, i.e. change the pictures of the monsters into Shia Muslims. So it isn't as simple as `modification'.
OK, so changing is not modification, I see. Please go on ...
You know perfectly well what I was refering to, and simply resort to stupid comments like these, again and again.
If you remove a file, and replace it with a new file you have a change, if you take the original file, and change the colours in it, you have a modified version of the same file.
It is clear that you are only interested in causing a flame war.