A man and a dog were locked in a house for five days without any food or drink. The first moment they are released outside, both would pursue the exact same things: food and drink. All their effort would be directed toward this aim. In this value system, nothing else compares with food or drink. None of art, philosophy, or religion serves the purpose. Once well-fed, however, the dog's values would remain the same while the man’s values should somehow evolve.