Because after a while I would stop noticing them. The human brain is wired to focus on differences in its environment – so it can rapidly discern a predator. If I installed pictures or other decorative objects, I would notice them for a few days and then my brain would ignore them. If I want to see art, I go to the gallery. The paintings there are of higher quality, and the total expenditure over time is less than the purchase price of cheap posters.’ In fact, I had not been to an art gallery since the tenth of May, three years before. But this information would weaken my argument and I saw no reason to share it with Rosie and open up other aspects of my personal life to interrogation