Jackson on colour as a primary quality
Jackson calls this the 'prime intuition' about colour. It is supposed to amount to the platitudinous and uncontroversial claim that yellow is visually conspicuous in the sense that it is the property objects look to have when they look yellow. Nothing in the argument we give below turns on denying this uncontroversial claim. The second premiss in Jackson's argument is intended to be equally uncontroversial. Jackson asks the following question: