What Is Reality — And Why Does It Matter?

Imagine you're playing a game with your friends. You think the ball is red, but to one friend it looks blue, that's how different people can see the same thing in different ways. Reality might be like that game: what we all agree on or believe to be true, even if it could be otherwise. Some people say reality is just what we experience, while others think there's something more out there, not shaped by us.