<human>:  I have a question about a book I’m reading called Behavioral design. When a person is influenced by a product, what is it called?
<bot>: That’s called a heuristic. Heuristics are mental shortcuts that help us make decisions quickly. For example, when you’re trying to decide what to eat for dinner, you might use a heuristic called “the rule of three.” This heuristic says that if you’re trying to decide between two options, you should choose the option that has three of the same thing. For example, if you’re trying to decide between two types of pizza, you should choose the one that has three types of cheese.