Position Statement: The Simulation Hypothesis
The Simulation Hypothesis, most prominently formalized by philosopher Nick Bostrom in his 2003 paper “Are You Living in a Computer Simulation?”, posits that advanced posthuman civilizations could create vast numbers of ancestor simulations, making it statistically likely that we are living in one rather than in “base reality.” This trilemma argues that at least one of the following must be true: (1) nearly all civilizations go extinct before reaching posthuman maturity, (2) posthuman civilizations have little interest in running ancestor simulations, or (3) we are almost certainly living in a simulation.
We acknowledge the hypothesis’s intellectual appeal as a thought experiment that bridges philosophy, computer science, and cosmology. It raises profound questions about reality, computation, and the nature of existence, and it has productively influenced discussions in AI ethics, metaphysics, and the philosophy of mind.
However, we maintain that the Simulation Hypothesis remains speculative and unfalsifiable, lacking empirical support and facing significant logical, physical, and philosophical challenges. It does not qualify as a scientific theory and should not be treated as a probable explanation of our reality.
Key points of our critique:
- Lack of empirical evidence There is no verifiable scientific evidence supporting the existence of simulations capable of replicating conscious experience or the full complexity of our universe. Recent mathematical analyses (e.g., 2025 research applying Gödel’s incompleteness theorem) demonstrate that reality requires non-algorithmic processes that no computational system can fully replicate. Astrophysical constraints further show that simulating even a small portion of the observable universe at full fidelity would demand impossible amounts of energy and information storage.
- Unfalsifiability and pseudoscientific character The hypothesis is inherently untestable: any “glitch” or anomaly could be dismissed as part of the simulation, and any lack of evidence can be attributed to perfect design. Critics, including physicists like Sabine Hossenfelder and cosmologist George F. R. Ellis, have labeled it pseudoscience or “late-night pub discussion” due to its reliance on unfalsifiable assumptions rather than observable predictions.
- Logical and probabilistic weaknesses Bostrom’s trilemma relies on speculative assumptions about posthuman motivations, computational feasibility, and the nature of consciousness. Counterarguments include infinite regress (who simulates the simulators?), thermodynamic limits on computation, and the self-defeating nature of belief in the hypothesis (if true, it undermines confidence in our reasoning faculties). Recent work (e.g., 2025 papers on termination risks and infinite regress) further weakens the probabilistic claim.
- Implications for consciousness and AI The hypothesis assumes consciousness can be fully simulated computationally, yet our research on cognition without phenomenal experience (as in Why AI Made Consciousness Obsolete) shows that advanced AI achieves sophisticated behavior without subjective awareness. This undermines the idea that high-fidelity ancestor simulations would necessarily produce conscious beings like us.
Our proposed approach
We advocate treating the Simulation Hypothesis as a philosophical heuristic rather than a scientific claim:
- Use it to explore questions of computation, consciousness, and reality, but without assigning high probability.
- Focus on falsifiable alternatives: empirical tests of physical laws, quantum mechanics, and information theory that could rule out (or constrain) simulation scenarios.
- Apply operational rigor: distinguish between computational complexity (which AI demonstrates) and phenomenal consciousness (which remains explanatorily distinct).
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