Does free knowledge require free software?

Last night I was having a bit of a philosophical debate and I thought I’d externalize it. Everyone knows that the Wikimedia Foundation is a big proponent of “free software”, and similarly, “free access”. By that I mean audio and video is uploaded in formats like Ogg Vorbis / Ogg Theora rather than patented formats like MP3 & H264. This is, without a doubt, as it should be. You wouldn’t...