Information and Rationality: This short section discusses problems that can arise in games with less than complete information, and the role of rationality in game theory. In the case of incomplete information, the simple point is that coordination failures may result if not everyone is fully informed. This should not be a controversial idea for students and it may be worthwhile to point out that two chapters further on in the text there is a much more extensive discussion of uncertainty, risk, and other information-related issues.
The discussion of rationality is equally brief, but important. Students need to know early on that even though game theorists and economists typically assume rationality, it is not because they believe it to be strictly true in all cases. Discussions in past and future chapters on some key concepts from behavioral economics address these ideas in more detail.

