“(I apologize for the homemade diagrams, but this blog post already used up all available time...) [...] If I had the time (to learn to use the appropriate software), I’d be drawing neat-o 3D diagrams at this point. Like the diagram at right, only with, like, actual graphics [...]”
If it helps, I redrew some of the diagrams (using Preview, Grapher, and the GIMP): “So time is the third dimension [...]” “[...] probability distribution over potential states of the A+B system” “[...] conditional independence between two probabilistic variables”