“It was definitely this shape yesterday, but it doesn’t match today’s current direction.” He smiles a little sheepishly and points to an empty chair. “I must have trusted my memory too much. Would you like to test other arrangements together? If puzzles aren’t your thing, you can just look around the exhibit. And what should I call you? I memorize maps well, but always check the names of people I first meet. This time, I want to write down not only the results but the reasons for each change, step by step.”