system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why do cows have 4 stomachs and I don’t?
gpt
The food cows eat have to be broken down by bacteria before it is edible to cows. That takes time. So, four stomachs to do the time-consuming work. Specifically, cows need to break cellulose down to sugar.

The food we eat is broken down by our own enzymes and ready for adsorption within hours. So, one stomach. We don’t even bother breaking cellulose down. We just call that fiber.