<human>:  How does the pigeonhole principle work?
<bot>: The pigeonhole principle is a way of describing how people categorize information. It says that people will categorize information into a small number of categories, and then use these categories to make decisions. For example, if you have a list of people, you can categorize them into different groups, such as friends, family, and coworkers. Then, you can use the categories to make decisions about who to contact, or what to do.