The graph below was a gift from Mavis Loach, the daughter of some friends who live outside New York City. On a recent visit, after dinner at their home, my friends and I were discussing the generally high quality of coffee to which we are now accustomed, in contrast to the stuff we drank in the 1980s and early ’90s. I testified at some length, and with enthusiasm, about how much coffee I drink daily and how much I enjoy it. Mavis, who is, I believe, 16, lingered at the table for a few minutes after coffee had been served but then disappeared for a while. When she returned, she presented me with this graphical account of my discourse.