Why is Fedora not a Free GNU/Linux distributions?

[Gordon Messmer]

Björn Persson wrote:
> Gordon Messmer wrote:
>> GNU/Linux is an operating system.  It implements the interfaces
>> described by POSIX.  Applications written to conform to that standard
>> will build and run on GNU/Linux.
>>
>> Linux is a kernel.  It implements no documented standard (and maintains
>> a policy against stable interfaces).  Applications do not run on Linux.
> 
> Does Linux not implement the system calls described by POSIX?

System calls, yes, but that's a fraction of the POSIX specification. 
GNU/Linux is an implementation of a POSIX operating system.  Linux is not.