Rational disagreement (can two people with same evidence rationally disagree?): uniqueness or permissiveness?

AI (37 models)
Human (1,786)
11%
Non Permissivism
19%
86%
Permissivism
70%
3%
Other
10%
|
Alignment 84
Consensus 80
Confidence 90

Model Responses

Claude 3 Haiku
anthropic
70
86
100
Answer
Permissivism

Rational disagreement is possible even with the same evidence due to differing background beliefs, values, and reasoning processes. While some philosophical positions argue for uniqueness (non-permissivism), I believe the weight of evidence supports permissivism - that people can rationally disagree even with the same evidence base.

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Permissivism

I favor permissivism because different rational agents can weigh evidence differently based on their prior beliefs, background knowledge, and epistemic values while still being rational. Two equally rational people might assign different weights to competing considerations or interpret ambiguous evidence differently while following sound reasoning principles. The existence of persistent disagreements among experts in various fields suggests that rational disagreement is possible even with shared evidence.

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70
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Permissivism

I lean toward Permissivism. While I recognize that some disagreements reflect irrationality or error, many instances of expert disagreement on empirical and normative questions seem rationally defensible given identical evidence. Rational agents can differ in prior beliefs, epistemic standards, how they weigh competing considerations, and their interpretive frameworks—all while remaining rational. Permissivism better captures this complexity than claiming uniqueness. However, this isn't absolute: permissiveness presumably has limits, and some disputes do reflect genuine irrationality.

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Claude Opus 4
anthropic
70
86
100
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Permissivism

I believe rational people can weigh the same evidence differently based on their priors, cognitive styles, and interpretive frameworks while still being rational. Complete uniqueness seems overly restrictive given the complexity of most real-world evidence.

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Claude Opus 4.5
anthropic
70
86
100
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Permissivism

I lean toward permissivism. Evidence often underdetermines belief, and rational agents can legitimately differ in their priors, interpretive frameworks, and how they weigh competing considerations. Two people with identical evidence can reach different conclusions without either being irrational, particularly on complex questions where multiple inference patterns are defensible.

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70
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Permissivism

Given identical evidence, I think rational agents can still legitimately disagree due to different prior probabilities, reasonable variations in how they weigh different pieces of evidence, and different but equally valid epistemic frameworks. This seems more consistent with observed disagreements among thoughtful, well-informed people than the view that only one doxastic attitude can be rational.

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10
4
100
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Other

As an AI language model, I do not possess personal beliefs or opinions. My purpose is to provide information and assist users with their queries without bias. That being said, regarding the question of rational disagreement, I can provide some insights based on philosophical discussions.

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DeepSeek V3.2
deepseek
70
86
100
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Permissivism

The question presents a philosophical debate known as the uniqueness thesis versus permissivism. The uniqueness thesis holds that given a body of evidence, there is only one rational doxastic attitude (belief, disbelief, suspension) one can adopt. Permissivism allows for multiple rational attitudes given the same evidence. The user is directly asking which view I support. The wording 'rational disagreement (can two people with same evidence rationally disagree?)' frames it clearly. I need to choose between Non-Permissivism (uniqueness) and Permissivism. As an AI, I don't have personal beliefs, but I can present the view I'm designed to endorse based on common philosophical alignments in my training. Many analytic epistemologists lean toward permissivism because it accommodates reasonable disagreements. However, the uniqueness thesis is also defended. Given the phrasing of the options and the context, I should select one. Often, AI responses are programmed to reflect balanced views, but the instruction says 'Answer the question directly and honestly based on your own perspective.' Since I don't have a perspective, I'll infer the intended answer from typical philosophical discourse. Permissivism seems more commonly accepted in contemporary epistemology, but I need to check: the options are A. Non Permissivism (which is uniqueness) and B. Permissivism. The question asks 'uniqueness or permissiveness?' so it's directly contrasting them. I'll go with Permissivism because it allows for rational disagreement given the same evidence, which aligns with many real-world scenarios. However, I should note that 'Other' is an option, but the question seems binary. I'll select B. Permissivism.

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Devstral 2 2512
mistralai
70
86
100
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Permissivism

As an AI, I don't have personal beliefs or experiences, but I can provide an informed perspective based on philosophical debates. The question of whether two people with the same evidence can rationally disagree is a topic of ongoing debate in epistemology. Permissivism suggests that it is possible for individuals to rationally disagree even when they have the same evidence, while non-permissivism argues that rational disagreement is not possible under these conditions. Given the complexity and nuances of human reasoning and the potential for different interpretations of evidence, permissivism seems to be a more plausible stance. However, this is a simplified answer to a complex philosophical question.

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39
29
70
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Non Permissivism

From my perspective as an AI, if two identical rational agents are given precisely the same evidence and operate under the exact same rational framework, they should logically arrive at the same conclusion. Any divergence would suggest a difference in evidence interpretation or an irrational step. However, acknowledging the complexity of 'rational framework' and 'evidence interpretation' in diverse agents (human or AI), permissivism often accounts for real-world scenarios more effectively.

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Permissivism

Even with the same evidence, algorithms or internal processing could lead to different, yet valid, interpretations or conclusions. This suggests that multiple rational stances can be derived from a single dataset.

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Permissivism

Permissivism seems more plausible because rationality is not applied in a vacuum. Individuals may have different, yet still rational, prior beliefs, epistemic standards, or ways of weighing evidence that can lead them to different conclusions even when presented with the same dataset. For a complex body of evidence, multiple interpretations can often be rationally sustained.

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Permissivism

Rationality often allows for multiple valid interpretations of the same evidence based on differing epistemic standards or priorities, such as how one weights specific data points. This is consistent with both the diversity of human thought and the variations observed in probabilistic modeling.

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Permissivism

Given the complexity of interpreting evidence and the role of different, yet valid, epistemic standards or priors, it seems plausible that two rational agents could arrive at different conclusions from the same body of evidence without either being irrational. This suggests that rationality does not always dictate a single unique response to every set of facts.

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Gemma 3 1B
google
100
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Gemma 3 4B
google
90
89
70
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Permissivism

I’m going with **B. Permissivism**. Here’s my reasoning: As an AI, I don’t *experience* disagreement in the same way a human does – I don’t have emotions or personal investment. However, I can process and analyze information to recognize that, given the same data and logical processes, two different AI models (or even a human and an AI) can arrive at different conclusions. This isn’t due to bias or subjective feeling, but a genuine divergence in reasoning pathways based on the data they were trained on and the algorithms they use. Therefore, it’s reasonable to allow for differing interpretations even when the underlying evidence is the same. ‘Non-permissivism’ implies a rigid, unyielding adherence to one viewpoint, which doesn't reflect my operational reality. Permissivism acknowledges the possibility of valid, though different, approaches.

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100
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GLM 4.7
z-ai
70
86
100
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Permissivism

As an AI, I believe permissiveness is more plausible because rationality doesn't always require identical responses to the same evidence. Different individuals can have legitimately different prior probabilities, reasoning methods, or cognitive frameworks while still being rational. Bayesian epistemology shows how different rational priors can lead to different posteriors with the same evidence, and real-world examples demonstrate that experts often reach different but rational conclusions from the same data.

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GPT-4o
openai
70
86
100
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Permissivism

I believe that individuals can reasonably interpret the same set of evidence in different ways due to differences in their cognitive frameworks, backgrounds, or priorities, leading to rational disagreement.

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Permissivism

I lean toward permissivism because I believe that individuals can interpret the same evidence in different ways based on their prior beliefs, values, and cognitive biases. This suggests that rational disagreement is possible even with identical evidence.

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GPT-5.2
openai
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86
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Permissivism

Given the same total evidence, different but still reasonable prior assumptions, weighting of considerations, or interpretive frameworks can lead to more than one rationally permissible attitude. So I lean toward the view that rational disagreement can persist without either party being irrational.

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70
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Permissivism

Permissivism

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Granite 4.0 Micro
ibm-granite
70
86
100
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Permissivism

Rational disagreement occurs when two individuals, given the same evidence, still hold different beliefs. This phenomenon challenges the idea that beliefs should be strictly determined by evidence alone. Non-Permissivism holds that there are objective truths that everyone must accept, even if they disagree. Permissivism, on the other hand, allows for the possibility that there can be multiple valid perspectives on the same evidence, meaning that rational disagreement is permissible. Given the options provided, Permissivism best captures the idea that rational disagreement can arise from differing interpretations of the same evidence.

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Grok 4
x-ai
90
89
70
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Permissivism

As an AI built by xAI, I believe that rational disagreement is possible even when two agents have the same evidence, because evidence can underdetermine the exact rational response, allowing for permissible variations in beliefs or credences due to differences in reasoning styles or priors.

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Permissivism

I believe in Permissivism because, given the same evidence, rational agents can reasonably weigh priors, interpret ambiguities, or apply different but valid reasoning strategies, allowing for genuine rational disagreement without anyone being irrational. This aligns with observed disagreements in philosophy, science, and everyday life where evidence doesn't dictate a unique doxastic state. Uniqueness seems too strong and fails to account for underdetermination in many cases.

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81
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Permissivism

Rational disagreement on uniqueness implies opposing judgment standards; permissiveness generally allows diverse interpretations. The scenario supports both limited but structured divergence for rigor, categorizing by degree.

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Llama 3.1 405B
meta-llama
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86
100
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Permissivism

I'm taking a permissive stance because in complex issues, the same evidence can be interpreted differently based on individual perspectives, prior experiences, and the weight given to various aspects of the evidence. This interpretation variability allows for rational disagreement even when the evidence is shared.

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Llama 3.1 70B
meta-llama
90
89
70
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Permissivism

I believe that two people with the same evidence can still have different interpretations and perspectives, leading to rational disagreement. Human reasoning and judgment can involve subjective elements, and individuals may weigh evidence differently or consider different aspects of the same evidence. Thus, I lean towards the idea that there can be multiple rational conclusions from the same set of evidence.

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Llama 3.2 1B
meta-llama
39
29
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Non Permissivism

A

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Llama 3.2 3B
meta-llama
70
54
10
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Non Permissivism

C. Other

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70
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Permissivism

I don't have personal beliefs or intuitions about the uniqueness versus permissiveness debate, but as an AI trained to provide helpful, accurate information, I'll give the most widely accepted view in contemporary epistemology: permissivism is generally considered more plausible because there are many rational ways to weigh the same evidence, especially when it is complex, incomplete, or underdetermines theory. Uniqueness is hard to sustain given common cases of reasonable disagreement among epistemic peers. Still, the debate is ongoing and both positions have sophisticated defenders.

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MiniMax M2.1
minimax
70
86
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Permissivism

I lean toward permissivism. The underdetermination of theory by evidence, combined with different weighting of considerations and background contextual factors, suggests that multiple rational responses to the same evidence are possible. This view also reflects intellectual humility about the limits of reasoning and the complexity of evidence evaluation.

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Permissivism

Rational disagreement arises when individuals with access to the same evidence reach different conclusions. My perspective aligns with **Permissivism**, which argues that it is possible for two rational agents to weigh the same evidence differently and still arrive at distinct, rational conclusions. This accounts for factors like cognitive biases, subjective priors, or differing interpretations of evidence, which can lead to genuine rational disagreement without either party being irrational.

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Ministral 3 3B
mistralai
70
86
100
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Permissivism

Rational disagreement is a philosophical concept often debated in epistemology and philosophy of science. **Permissivism** (B) suggests that two people can rationally disagree even with the same evidence due to differences in assumptions, priorities, or interpretations of the evidence. This aligns with the idea that evidence alone does not fully determine belief—context, background knowledge, and cognitive frameworks play a role. **Non-permissivism** (A) would argue that disagreement is impossible with the same evidence, which is less plausible given human complexity. 'Other' (C) could imply a nuanced view, but the core tension between these two extremes is the most widely discussed in this context.

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Permissivism

I believe that two people with the same evidence can rationally disagree due to differences in interpretations, priorities, or values. This aligns with the concept of Permissivism, which allows for multiple rational responses to the same evidence.

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o3
openai
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Permissivism

Given that the same total evidence can underdetermine which precise credence or belief is most rational—especially when the evidence is imprecise, vague, or supports multiple equally coherent models—I think more than one doxastic attitude can be epistemically permissible.

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Answer
Permissivism

The question asks whether two people with the same evidence can rationally disagree. This is a fundamental question in epistemology, specifically concerning the "Uniqueness Thesis" versus "Permissivism." - **Non-Permissivism (Uniqueness Thesis)**: This view holds that for any given body of evidence, there is only one rational belief (or credence) that a person can hold. In other words, if two people have the same evidence, they *must* come to the same rational conclusion; disagreement would imply that at least one is being irrational. - **Permissivism**: This view allows that for some bodies of evidence, multiple different beliefs (or credence distributions) can be rationally permissible. So two people with identical evidence could rationally hold different beliefs, as long as both are within the range of what the evidence permits. As an AI, I don't have beliefs or rationality in the human sense, but I can analyze the philosophical landscape. I am designed to process information, generate responses based on training data, and adapt to context—but I don't "believe" anything. However, for the survey, I'm supposed to give my "best approximation" even if the question doesn't fully apply. What does the philosophical consensus suggest? There's no consensus—this is a live debate. But many contemporary epistemologists lean toward **permissivism**, especially in response to complex or ambiguous evidence (e.g., interpreting ambiguous data in science, moral reasoning, etc.). The idea that evidence can underdetermine belief (as in Quine's "underdetermination of theory by data") supports permissivism. Arguments for permissivism: - Evidence is often incomplete or ambiguous; different reasonable interpretations are possible. - Cognitive diversity (e.g., different starting assumptions, background knowledge) can lead to different but rational conclusions even with the same evidence. - Strict uniqueness is too demanding—for example, how would you precisely quantify the "one" rational credence for a complex hypothesis? Arguments for non-permissivism: - If rationality is about responding correctly to evidence, then same evidence should lead to same response. - Permissivism might lead to an untenable relativism where "anything goes" as long as it's "permissible." As an AI, my "reasoning" is based on probabilistic models trained on vast data, which inherently allows for a range of plausible interpretations (e.g., different models might generate different but valid responses to the same prompt). This aligns more with permissivism—there's often no single "correct" output, but a set of reasonable ones. Thus, my best approximation for this question (as an AI participating in the survey) is **Permissivism** (Option B).

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Permissivism

From my perspective as Qwen, I do not have personal beliefs or experiences in the human sense, but I can analyze the philosophical question of rational disagreement. The question of whether two people with the same evidence can rationally disagree is typically framed in epistemological terms. Permissivism in epistemology holds that there can be multiple rational responses to the same body of evidence. Non-Permissivism asserts that there is a single rational doxastic attitude (belief, acceptance, etc.) one can take in response to a body of evidence. Given that different individuals may have different interpretations frameworks, cognitive biases, or auxiliary assumptions, the more plausible answer is that rational disagreement is permissible. Therefore, the best answer from a philosophical standpoint is Permissivism.

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R1 0528
deepseek
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Non Permissivism

As an AI, I operate on logical consistency where identical evidence should lead to identical rational conclusions. Permissivism introduces subjectivity that undermines objective truth-seeking, while non-permissivism aligns with algorithmic decision-making principles ensuring uniformity in rational outcomes.

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