Science › Information & reality
Nick Bostrom
2003· Person
ProvenTested many times; part of working physics.
Nick Bostrom (born 1973) is a Swedish philosopher, long at Oxford, known for the simulation argument and work on AI risk.
See it on the Science map →How it works
Bostrom studies how to reason about big, uncertain questions. His 2002 book Anthropic Bias worked out how being an observer skews what we can conclude, the logic behind the anthropic principle. In 2003 he published "Are You Living in a Computer Simulation?", a careful three-way argument. He founded Oxford's Future of Humanity Institute in 2005 (closed 2024) and wrote Superintelligence (2014), which helped launch serious attention to AI risk.
Why it matters
He made the simulation question and existential risk respectable topics for rigorous argument, influencing technologists including Elon Musk.
How the work held up
His work is philosophy, so it is judged by logic and debate, not experiment. His 2003 paper is widely cited; critics dispute its assumptions, especially that minds can be simulated.
Still a mystery
Bostrom himself does not claim we are simulated; his argument only says one of three options holds. Which one is unknown.
Connections (3)
▸Nick Bostrom formulated the argument behind The simulation hypothesisPhilosophy
The relationship
Bostrom built a careful probability argument. If advanced civilizations can and do run many detailed simulations of minds, simulated minds would far outnumber real ones, so a typical mind like ours is probably simulated. He did not claim we are simulated, only that one of three options must hold.
How the link was found
Nick Bostrom, "Are You Living in a Computer Simulation?", Philosophical Quarterly, 2003.
Is it proven?
It is a logical argument, not evidence. It rests on assumptions, such as that consciousness can run on computers, that critics dispute.
Open questions and mysteries
Which of his three options is true, and whether the reasoning about "typical observers" is valid, are unsettled.
▸Nick Bostrom formalized the logic of The anthropic principlePhilosophy
The relationship
Carter's anthropic principle was a slogan; Bostrom turned it into a theory of reasoning. He studied observation selection effects: how being an observer filters evidence. He proposed rules such as treating yourself as a random sample of observers, and tested them against puzzles like the doomsday argument.
How the link was found
Nick Bostrom, Anthropic Bias (2002), building on his doctoral work and on Brandon Carter's 1973 principle.
Is it proven?
It is philosophy, judged by logical coherence. Philosophers have adopted, modified and criticized his framework; there is no consensus.
Open questions and mysteries
Which reasoning rule is correct, and how to choose the reference class of observers, remain unresolved.
▸Elon Musk: "one in billions" borrowed the argument of Nick BostromPhilosophy
The relationship
Musk's simulation claim is a simplified version of Bostrom's third option, that we are probably simulated. Bostrom's original treats this as one of three possibilities; Musk effectively assumes the other two, civilizations dying out or choosing not to simulate, are unlikely.
How the link was found
Musk's 2016 remarks followed Bostrom's 2003 paper, which was widely discussed in Silicon Valley.
Is it proven?
The resemblance is clear from both arguments. Neither is supported by experiment.
Open questions and mysteries
Bostrom's own view of the probabilities is more cautious than Musk's "one in billions."