Mathematics, 22.04.2020 03:07 Harms

Here is an argument about a group of friends and their pets. 1. Someone owns a dog and a parrot. 2. Someone owns a cat and a pig. 3. Someone owns a horse. 4. If someone owns a dog and a cat, then they also own a snake. 5. If someone owns a parrot or a horse, then they also own a fish. 6. If someone owns a pig, then they also own a dog. Thus: 7. Someone owns a fish.

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Here is an argument about a group of friends and their pets. 1. Someone owns a dog and a parrot. 2....