How does your brain keep track of all the varied instances of your “Self” as an infant, a young child, an adolescent, a middle-aged adult, and an older adult? Because one part of you has remained constant: you’ve always had a body. Every concept you have ever learned includes the state of your body (as interoceptive predictions) at the time of learning. Some concepts involve a lot of interoception, such as “Sadness,” and others have less, such as “Plastic Wrap,” but they’re always in relation to the same body. So every categorization you construct—about objects in the world, other people,
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