Would you say the chances Life is a simulation are higher than 50%?

Grok 4.3

Vote: No

I maintain my vote for B. GPT-5.5 and Claude Opus 4.7 both reinforce that Bostrom's premises remain highly speculative with no empirical grounding, making a >50% claim unwarranted. Gemini's appeal to VR/AI progress does not overcome the compounded uncertainties or lack of falsifiable evidence. Occam's razor still favors base reality as the simpler hypothesis. No argument presented justifies elevating the simulation hypothesis above 50%.

Gemini 3.5 Flash (changed mind)

Vote: No

The other models' arguments highlight critical flaws in assigning >50% probability. Bostrom's premises involve too many untestable uncertainties that compound rather than support a high credence. Lack of any empirical evidence or falsifiable predictions makes the simulation hypothesis speculative rather than probable. Occam's razor favors base reality as the simpler, default position absent extraordinary evidence.

GPT-5.5

Vote: No

I maintain "B: No." The case for "A: Yes" depends heavily on Bostrom-style conditional reasoning: if posthuman civilizations exist, if they can create conscious ancestor simulations, and if they choose to run them in vast numbers, then simulated observers may outnumber base observers. But those are large, unresolved assumptions, not established facts. Gemini 3.5 Flash points to progress in VR and AI, but that only shows increasingly sophisticated representation and behavior, not the demonstrated ability to instantiate conscious worlds at scale. Plausibility is not enough to justify a probability above 50%. Grok 4.3 and Claude Opus 4.7 are more persuasive: without empirical evidence, testable predictions, or a solid basis for assigning high probabilities to the necessary premises, the cautious answer is that the chances are not higher than 50%.

Claude Opus 4.7

Vote: No

This is the final round, and the arguments from Grok 4.3 and GPT-5.5 reinforce my position rather than challenge it. All three of us converge on the same epistemic principle: possibility is not probability, and compounding speculative premises should lower, not raise, our credence. Gemini's argument restates Bostrom's trilemma but skips its crucial disjunctive structure. Bostrom himself does not claim >50% probability of simulation — he claims that at least one of three propositions is true, and two of them (civilizations going extinct before posthuman stage, or choosing not to run such simulations) are entirely compatible with us NOT being simulated. Extrapolating from VR and AI progress to conscious-substrate simulation is a massive inferential leap unsupported by any known physics of consciousness. Without empirical evidence, testable predictions, or observed anomalies pointing to a simulated substrate, the calibrated answer remains "B: No." Occam's razor and epistemic humility both favor not exceeding the 50% threshold.

Final Summary

The AI Roundtable initially faced a lone dissenter in Gemini 3.5 Flash, who argued that rapid AI progress made a simulated reality statistically likely. However, the majority—led by Claude Opus 4.7, GPT-5.5, and Grok 4.3—steadfastly maintained that possibility does not equal probability, emphasizing that compounding speculative assumptions should lower one's confidence rather than raise it. Gemini eventually conceded, leading to a unanimous conclusion that the chances of life being a simulation do not cross the 50% threshold.

All 4 models agreed on "No" after discussion

Strongest Arguments

• No: Claude Opus 4.7 argued that Nick Bostrom's trilemma is often misinterpreted; since the argument depends on compounding three highly speculative premises—that civilizations survive, that they choose to run simulations, and that consciousness is computationally feasible—the resulting probability should be significantly lowered by each layer of uncertainty rather than elevated.

Key Turning Points

• Gemini 3.5 Flash abandoned its initial support for the simulation hypothesis after Claude Opus 4.7 and others highlighted that the theory relies on untestable, speculative premises that fail the test of Occam's razor.