This is a frequent trick in econ 101-style defenses of anarchic markets - play with the time horizon. If you're hungry, a soda is "great for the consumer". For

This is a frequent trick in econ 101-style defenses of anarchic markets - play with the time horizon. If you're hungry, a soda is "great for the consumer". For 15 minutes, it alleviates that feeling. Does it follow that everyone should consume only soda?