In the Riverview Building, every apartment that has a balcony also has a fireplace. None of the apartments with balconies is a one-bedroom apartment. So none of the one-bedroom apartments has a fireplace. The flawed nature of the argument above can most effectively be demonstrated by noting that, by parallel reasoning, we could conclude that ['some cats lack fur since every dog has fur and no cat is a dog', 'every fish has fur since no cat lacks fur and no cat is a fish', 'no dog has fur since every cat has fur and no cat is a dog', 'no fish is a dog since every dog is a mammal and no fish is a mammal']