File: 8 October 2026 · Source date: 8 October 2026
What the argument actually says
The simulation hypothesis suggests that the reality we experience may be an environment calculated by a more advanced civilization. Nick Bostrom's 2003 argument does not directly prove the conclusion that "we are in a simulation." He argues that at least one of three propositions will be true: technological civilizations will disappear before they reach the stage where they can build simulations; Those who reach this stage run very few ancestor simulations; or simulated observers far outnumber biological observers.
Why is scientific testing difficult?
For a claim to gain scientific value, observations that could falsify it must be described. If it is said that "the simulator can change every evidence", the hypothesis becomes compatible with every result and loses its testability. The fact that space-time is discrete, that there is a speed limit, or that regularities in the constants of physics are not evidence of simulation alone; they need to be compared with physical models that explain the same observations.
Separating evidence from thought experiments
The simulation hypothesis is an open debate today standing at the border of science, epistemology, and metaphysics. The most productive question before asking “are we in a simulation?” is “what observation distinguishes between a natural physics model and a simulation explanation?” is the question. Just because a thought experiment is powerful does not mean it is physically verified.
discussion question
What independent and replicable evidence would you like to see to make you take the simulation claim seriously?
Resources and further reading
Nick Bostrom — Are You Living in a Computer Simulation? ↗PDF version of the article ↗Share your answer
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Established science, active research, and philosophical speculation are clearly separated.