The article introduces a new way to understand how people make decisions when their preferences change over time. It uses a framework called practices, which are groups of people who share similar preferences. This framework helps explain why people sometimes make decisions that seem inconsistent or don't make sense. The researchers found that preferences can be compared without needing to combine them, and that choosing a preference is a decision in itself. This helps explain common decision-making problems in economics and finance, like why people hold onto investments too long or why there are costs associated with having someone else manage your money.