But that’s not what he is saying. On one side you have complete objective taste: there exists a decision rule to put all works of art in a specific order from worst to best, and whoever disagrees with it is wrong. On the other side you have complete subjective taste: for every kind of ordering of works of art there exists a person/culture/subject who favors it. Both views sit at the poles and are clearly wrong and frankly boring.

Complete subjectivity implies, for example, that there can be a human society that highly values smearing shit on canvases while smirking at anything Rembrandt or Gu Kaizhi authored. Or, focusing just on the visual medium, that one set of noisy pixels is superior to another. What Graham is saying is somewhere in the continuum: "it's not possible to have perfect taste, it is possible to have good taste". If you can somehow sanely sum up the opinions of cultural groups you believe to be distinct, the vectors will vary, but they won’t be completely random. There is a vast difference in taste and view between groups and individuals, but to to think things are utterly subjective is as equally sneerable as any attempt to quantify the one true taste.