system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the difference between Chaos Theory and The Butterfly Effect?

I thought I knew what The Butterfly Effect was, then someone (well, Life is Strange did) explained Chaos Theory, and they sound like pretty much the same thing? What is the difference?
gpt
Chaos Theory describes the circumstances in which something like the Butterfly Effect can take place. Chaos Theory is (among other things) a set of highly sensitive conditions which allow the Butterfly Effect (the precipitating dramatic effect of a small change on a sensitive system) to occur. 

Chaos Theory is the line of dominoes. Butterfly Effect is you tipping over the first one.