So there you are, standing in the mall, and your brain must determine whether its prediction of Uncle Kevin ultimately becomes your perception and directs your action, or whether a course correction is required. To determine the details, the brain unpacks the summary of all the sensory input into a gigantic cascade of more detailed predictions, like uncompressing a YouTube video for viewing, or adding water to dehydrated food to make it edible. This process, shown in figure 6-1, is the same one that builds up a concept from details, but in reverse.
