b. 1973 · A portrait
A philosopher argued in 2003 that at least one of three propositions must be true, the last being that we are almost certainly living in a simulation. He accepts the logic, not a conclusion.
The line above is how his claims were received — by the scientists whose job was to doubt them. It rises as a claim is tested and accepted, and the room brightens with it. It is not a verdict on truth: some accepted ideas are later overturned, and some rejected ones come back. A hollow point is a claim still open.
Bostrom published 'Are You Living in a Computer Simulation?' in Philosophical Quarterly, arguing that at least one of three propositions holds: almost no civilizations reach the technology to run realistic ancestor-simulations; those that can choose not to; or simulated minds vastly outnumber real ones and we are almost certainly among them.
Astronomer David Kipping re-ran the trilemma using Bayesian statistics, weighing the three options evenly instead of assuming any one was likely. He found the odds of living in a simulation come out just under fifty-fifty, slightly favoring an unsimulated reality.
Astrophysicist Franco Vazza calculated that simulating a meaningful portion of the universe from within itself would require energy far beyond physical limits, since processing information carries a minimum energy cost no simulator could escape.
Bostrom has said he accepts the trilemma's logical structure but not which branch is true, and has resisted being read as endorsing the simulation itself. Philosophers and physicists continue debating the argument's premises without resolving which option holds.