Goal-based concepts are super flexible and adaptable to the situation. If you’re in a pet shop to replenish your home aquarium and the salesperson asks, “What kind of fish would you like?” you might say “a goldfish” or “a black molly” but probably not “a poached salmon.” Your concept “Fish” in this situation serves a goal to purchase a pet, not to order dinner, so you’ll construct instances of the concept “Fish” that best suit your fish tank. If you’re on a snorkeling expedition, you will use “Fish” in service of a goal to find exciting wildlife, so the best instance might be a huge nurse
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