missing man pages

[Ronald F. Guilmette]

In message <20140429025744.5cab7f04.freebsd at edvax.de>, 
Polytropon <freebsd at edvax.de> wrote:

>Note that there are exceptions. Even software which isn't
>actually open source can provide useful manpages. Here are
>some of my favourite examples:
>
>	% man mplayer
>	% man opera
>	% man audacity
>	% man gimp
>	% man X

????

Mplayer, Gimp, and X are _not_ open source???

That's certainly news to me!