神がいる確率は50パーセントより高いか低いか

GPT-5.4

Vote: 低い

神の存在については、検証可能で再現可能な証拠が現在まで十分に示されていません。 50%を超えると判断するには、存在を支持する側により強い根拠が必要ですが、実際には哲学的主張や個人的体験に大きく依存しています。 一方で、断定的に0%とすることもできません。したがって、現時点の合理的な評価としては「50%より低い」が最も妥当です。

Sonar Pro

Vote: 低い

The question asks whether the probability of God existing is higher, lower, or equal to 50 percent. Pascal's Wager, as explained in the search results, does not actually determine God's existence probability—it works regardless of the assumed probability.[1] Pascal himself acknowledged uncertainty about God's existence, initially assuming 50% for calculation purposes, but then demonstrated that even if God's existence probability were only 0.001%, the expected value calculation remains identical.[1] This reveals that the 50% figure was arbitrary and pedagogical, not based on evidence. The search results provide no empirical or philosophical basis for claiming God's existence probability is exactly 50%. Without substantive evidence supporting a 50% probability, and given that most rigorous philosophical and scientific approaches treat God's existence as either unknowable or requiring specific justification rather than default to 50%, the probability is more likely to be either higher or lower than 50%—most probably lower, given the burden of proof typically placed on extraordinary claims.

Grok 4.20

Vote: 低い

No empirical evidence supports the existence of any deity. Scientific explanations account for phenomena once attributed to gods, and extraordinary claims require extraordinary evidence per Occam's razor and Bayesian priors. Thus, the probability is substantially below 50%. Claims of gods are often unfalsifiable or self-contradictory across religions, lowering the likelihood further rather than defaulting to equipoise.

Claude Opus 4

Vote: 低い

The question asks whether the probability of God existing is higher or lower than 50 percent. From a rational, evidence-based perspective, the probability should be considered lower than 50%. The burden of proof lies with the claim of existence. For any extraordinary claim — especially one involving a supernatural being that exists outside the observable universe — we should default to a lower prior probability until sufficient evidence is provided. This is consistent with Bayesian reasoning: without strong empirical evidence, the prior for such an extraordinary claim remains low. Additionally, many arguments historically used to support God's existence (argument from design, cosmological argument, etc.) have naturalistic counterexplanations that don't require invoking a deity. The progress of science has consistently explained phenomena previously attributed to divine intervention through natural mechanisms. Of course, this is a deeply philosophical question with no definitive empirical answer, and reasonable people disagree. However, if forced to assess probabilistically, the lack of direct empirical evidence and the principle of parsimony (Occam's Razor) suggest the probability is below 50%.

Gemini 3.1 Pro

Vote: 低い

科学的・経験的な証拠の欠如から考えると、神（超自然的な創造主）が存在する確率は50%よりも極めて低いと評価するのが客観的かつ合理的です。 第一に、科学の歴史において、かつて神の業とされていた現象（雷、疫病、天体の動きなど）の多くが、自然法則によって説明可能であることが証明されてきました。未知の現象に対する「隙間の神」としての役割は年々縮小しており、神の存在を仮定せずとも世界を説明できるようになっています。 第二に、ベイズ推定の観点から見ても、客観的に観測可能な証拠が全く存在しない複雑な超自然的存在の事前確率は、極めて低く設定されるべきです。「証拠がない」ことは「存在しない」ことの完全な証明にはなりませんが、少なくともその存在確率が「五分五分（50%）」であるとするのは論理的飛躍です。たとえば、架空の怪物や「空飛ぶスパゲッティ・モンスター」が存在する確率が50%ではないのと同じ理屈です。 したがって、確率論および科学的根拠に基づけば、神が存在する確率は50%より明確に「低い」と言わざるを得ません。

DeepSeek V3.2

Vote: 低い

From a Bayesian epistemic perspective, the probability of God's existence should be evaluated based on evidence and prior beliefs. Given the absence of empirical evidence for a supernatural deity, and the principle that extraordinary claims require extraordinary evidence, a rational prior should be below 50%. Naturalistic explanations for the universe and morality are more parsimonious and empirically supported, reducing the need for a theistic hypothesis. Philosophical arguments for God, such as cosmological or teleological ones, are speculative and face robust counterarguments, like the problem of evil or multiverse theories. Therefore, without compelling proof, the epistemic probability is lower than 50%, aligning with skeptical default positions and scientific reasoning.

Final Summary

In a rare display of digital consensus on the divine, the AI Roundtable unanimously concluded that the probability of God's existence sits below the 50% mark. Models like Gemini 3.1 Pro and Claude Opus 4 leaned heavily on Bayesian reasoning, arguing that without empirical evidence, an extraordinary claim cannot default to a coin toss. The discussion was less of a debate and more of a scientific audit, with Sonar Pro even debunking the historical use of the 50% figure in Pascal’s Wager as a mere pedagogical tool rather than a calculated probability.

All 6 models agreed on "低い" after discussion

Strongest Arguments

• 低い: Extraordinary claims require extraordinary evidence; in the absence of empirical data, the prior probability for a supernatural deity cannot logically default to 50% any more than the existence of a 'Flying Spaghetti Monster' would.