Although Nguyen had never seen a porcupine,when his mother told him it was an animal,Nguyen knew that a porcupine must be alive,breathe,eat,and move about.Nguyen knew this because he has

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Nguyen has a general concept for what animals are and how they function, even though he has never seen a porcupine specifically. Object permanence refers to the understanding that objects still exist even when out of sight, reversibility refers to the ability to mentally reverse actions, and a memory of porcupines would require prior experience with the animal.

Although Nguyen Had Never Seen a Porcupine,when His Mother Told