QUOTE : Chang opened the door and checked the hallway. She said, “Let’s go.” She opened the door wider. There was a guy standing there. Eyewitness testimony was suspect because of preconditions, and cognitive bias, and suggestibility. It was suspect because people see what they expect to see. Reacher was no different. He was human. The front part of his brain wasted the first precious split second working on the image of the guy at the door, trying to rearrange it into a plausible version of a theoretical McCann. Which was not an easy mental task, because McCann was supposed to be sixty years old and thin and gaunt, whereas the guy at the door was clearly twenty years younger than that, and twice as solid. But still Reacher tried, instinctively, because who else could it be, but McCann? Who else could be at McCann’s door, in McCann’s building, in McCann’s city? Then half a second later the back part of Reacher’s brain took over, and the image resolved itself, crisp and clear, not a potential McCann at all, not even remotely a contender, but the familiar twice-glimpsed face, now three times seen, first in the diner, next in the Town Car, and finally in the there and then, in a dim upstairs hallway in a three-floor walk-up.