Simulation hypothesis is an idea that the universe we live in is actually a computer-generated simulation. It means that the reality we experience is like a computer game: the people, the things we can touch, the sky, and even time are all things that have been created by limitless powerful computers. To understand why people would think this, it helps to think of how people use computers today. We use computers to create video games with realistic characters, settings, buildings, and even silly things like dinosaurs running around. Now think about what if the computers got even more powerful and advanced and could create an entire world with all its complexities. That is what people mean when they talk about the simulation hypothesis!