Started working through the examples in Collective Intelligence, learning Python syntax as I go, and trying to figure out similarity metrics. The math is beyond me, especially when it comes to the more complicated metrics like Jaccard Coefficients or Tanimoto Scores, but given that I can disentangle the arithmetic of the algorithms, I don't really need to understand why they do what they do. I might work on a Delphi application in parallel to the Python, so that I'm forced to re-code the examples in a way that makes me understand them.