Is there difference between the butterfly effect and the chaos theory?

Yes there’s a difference. The butterfly effect is just one example that shows why it’s difficult to model complex systems. That’s why it’s a good way to explain what chaos theory “is,” because chaos theory is a certain perspective on trying to model complex systems. Most people who model the weather are not exactly chaos theorists, although some of them know a lot about chaos theory. Chaos theory is a branch of physics and mathematics that tries to unify and make general statements about modeling complex systems.

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