Chapter 12Summary
In chapter 12, Hallinan discusses constraints and affordances. He defines constraints as “simple mental aids that keep us on the right track by limiting our alternatives.” He defines affordances as “clues to how a thing can be used.”
He discusses the technique by which different organizations name things and gives two examples: prescription drug names and identifiers that pilots use.
Chapter 13
Summary
In chapter 13 Hallinan begins with an example of two people who moved to L.A. and then ended up moving back to Wisconsin. He uses this example to show how people mispredict how they will feel about important life decisions in the future because they focus on relatively minor factors.
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