There's an extremely cool tool at Neoformix. It analyzes text for similarities and generates an arc map relating concepts. I tried it on Photons at the Doors of Perception and was impressed to see that it was able to distill the basic thesis of my post: Perception is an energetic exchange between a mind and its environment. Or perhaps, I was able to use the tool to spot my basic thesis. Either way, I plan to use the Document Arc Diagram tool to analyze more subjects.