Debian is another Linux distribution known for strict licensing requirements and adherence to free software principles. While both Debian and gNewSense rigorously exclude non-free software and binary blobs from their official releases, Debian maintains and hosts unofficial repositories of non-free software and firmware binaries, and Debian free software sometimes depends upon or suggests the optional installation of proprietary software, under the theory that users' own informed discretion about the use of such software should be paramount, as expressed in Clause 5 of the Debian Social Contract (though Debian's democratic project management has seen this stance become a source of recurrent controversy). gNewSense, by contrast, does not provide any packages which depend on or suggest the use of non-free software, firmware, extensions, or plugins, nor does the gNewSense Project provide convenience-access to proprietary software for any reason, seeing this as an abrogation of the commitment to the development of free software solutions. Similar to Debian, gNewSense policies do not allow including documentation that are licensed under the GNU Free Documentation License with invariant sections. This includes many manuals and documentation released by the GNU Project themselves.