Could everything around us be a simulation, like a hugely advanced computer program? It sounds like the plot of a science fiction film, and it has inspired plenty of them. But it’s also a question that philosophers and scientists have discussed seriously.
No one has proven that we live in a simulation, and many experts think it’s unlikely or impossible to test. Still, it’s a fascinating idea to explore. Here are fifteen ideas people point to when they wonder about it. Think of them as conversation starters rather than facts.
Fifteen ideas behind the question
- Rapidly improving technology. Computer graphics and virtual reality get more realistic every year. Some wonder where that might lead in thousands of years.
- Artificial intelligence. As computers become better at mimicking human thought, people ask whether minds could one day be simulated.
- A philosophical argument. Some philosophers have argued that if advanced civilisations could run simulations of minds, simulated minds might outnumber real ones.
- Mathematical laws. The universe seems to follow precise mathematical rules, which some compare to code.
- Physical constants. Certain constants in physics seem finely balanced to allow life.
- Quantum strangeness. Some quantum behaviour seems puzzling, and people sometimes compare it to a program saving processing power.
- A smallest scale. Physics suggests there may be a smallest meaningful unit of space and time, which some compare to pixels.
- Fractals. Repeating patterns appear in coastlines, ferns and snowflakes.
- The Fibonacci sequence. This number pattern appears in sunflowers, pinecones and shells.
- DNA as code. Genetic information is stored in a kind of biological language.
- The Big Bang. The idea of the universe beginning from a single point raises deep questions about what came before.
- Vivid dreams. Dreams can feel completely real until we wake, reminding us how convincing experience can be.
- Ancient questions. Long before computers, philosophers in many traditions asked whether the world we perceive is the deepest reality.
- Memory quirks. Some people point to shared false memories. Psychologists usually explain these through how memory works.
- It can’t easily be disproven. Some argue we couldn’t tell from the inside. Others say an idea that can’t be tested isn’t a scientific claim.
This life still matters
Whatever the answer, our experiences, relationships and choices feel real and matter deeply. Suffering is real, kindness is real and the people around us are real to us.
How little is enough
Enjoy the question with curiosity, then bring your attention back to this moment. Notice your breath, the room around you and the people you love.
For more big questions, explore Metaphysics.
For a quiet place to write your way through this season, you’ll find a guided journal on the Guides page.
It is highly probable that we live inside a simulation but most of the arguments put forward here aren’t particularly convincing. The main reason is that we do not know what a real universe is like. But you already guessed that yourself when you write: “This is a somewhat looped argument. We can’t know for sure whether mathematical equations make the Universe work because we’re in a simulation, or whether it’s because that’s how the universe really works.” Sadly, this applies to most of the other arguments too.