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KNOW vs DO Responsibilities

Every object has two flavors of responsibility — data it KNOWS (the brain) and actions it DOES (the muscle). Most classes do both. Some only know. Some only do.

Pick a class — see what it KNOWS and what it DOES
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Customer
A person who buys tickets and watches movies
BOTH
🧠 KNOWS (Data) private fields
💪 DOES (Actions) public methods
← Thinking in Objects Derived Getters →