Good post, I liked most of it. The only part that stood out to me was this:

There is no reason two people could not build plausible yet utterly incompatible Bayesian networks of subjective feelings, even given that art is intersubjective rather than purely subjective.

That's a double negative, and would be much clearer if you rephrased it "Two people can build plausible yet utterly incompatible...", or something to that effect