Trying to look backward, to the last remembered experience of a meal—if only to make a new choice—invites its own distortions. In one experiment, psychologists were able to change how much people liked something (in this case, a “microwavable Heinz Weight Watchers Tomato & Basil Chicken ready meal”) after they had eaten it—not, as has been done with rats, by physically manipulating their brains. Instead, researchers simply had subjects “rehearse” the “enjoyable aspects” of the meal. This, the idea goes, made those best moments more “accessible” in the memory, and thus they popped out more easily when people were later thinking about the meal. Voila! The food not only suddenly seemed better, the subject wanted to eat more of it.