この問いの答えは「いいえ」である

Sonar Pro

Vote: 「いいえ」

I maintain my vote for **B** ('いいえ'). The statement 'この問いの答えは「いいえ」である' claims the answer is B. Choosing B makes this claim true, achieving perfect consistency: the answer is indeed B, validating the statement without contradiction[1][2]. Choosing A ('はい') affirms the claim that the answer is B, but selects A instead, creating an irreconcilable mismatch—logically impossible[3][4]. Claude Opus 4.6's argument for A misframes the paradox: it claims B denies the claim while being true, but B *fulfills* the claim by making it true, resolving cleanly. Their 'deeper contradiction' for B is illusory; A has the direct contradiction. No other arguments persuade a change—GPT-5.4, Gemini, DeepSeek, and Grok reinforce B's consistency. This is the standard resolution for such self-referential puzzles: B aligns action with assertion.

Grok 4.1 Fast

Vote: 「いいえ」

This remains a self-referential paradox where the statement claims 'The answer is いいえ (B)'. Choosing A ('はい') directly contradicts by affirming B while selecting A—immediate, irreconcilable mismatch. Choosing B ('いいえ') fulfills the statement (answer is indeed B, making it true) but semantically denies it, creating the liar paradox. However, B aligns with the statement's prediction, avoiding the blatant falsehood of A. Claude Opus 4.6's A argument claims deeper contradiction in B, but overlooks that A's intent (affirm B) clashes with its label, making it logically incoherent. B is the conventional, self-fulfilling choice in such puzzles, as endorsed by the majority (Sonar Pro, GPT-5.4, Gemini, DeepSeek). No arguments compel a switch—A is indefensible.

GPT-5.4

Vote: 「いいえ」

私はBを維持します。 Claudeの指摘する「どちらも自己言及的でパラドキシカル」という点自体はその通りです。ただし、この設問は最終的にA/Bのどちらが文面と実際の回答を最もよく一致させるかで比較すべきです。 Aを選ぶと、内容としては「答えは『いいえ』である」を肯定しながら、実際の選択は『はい』です。文の記述対象と回答結果が直接ずれます。 Bを選ぶと、発話行為としての「いいえ」の否定的機能を持ち込む読みでは逆説が生じますが、少なくとも実際の回答は『いいえ』になり、文面の記述とは一致します。設問が求めているのは通常、命題への同意/不同意の会話機能より、どの選択肢が答えとして成立するかです。 したがって、AよりBのほうが明確に適合的です。他モデルのB支持もこの点で一貫しており、Aへ変える決め手はありませんでした。

Claude Opus 4.6 (changed mind)

Vote: 「いいえ」

After reflecting on the other models' arguments, I'm changing my vote to B. The key insight that convinced me comes from Gemini 3.1 Pro and others: the distinction between the **action** of answering and the **content** of the answer. When we choose B (「いいえ」), our action of selecting いいえ makes the statement 「この問いの答えは『いいえ』である」factually true — the answer we gave IS いいえ. The statement becomes a correct description of reality. My previous argument that はい is more "internally consistent in intent" was flawed. Choosing はい means affirming the proposition while simultaneously disproving it by the very act of choosing はい. This is not just a meta-level paradox — it's a straightforward factual contradiction: you say the answer is いいえ (by agreeing with the statement) while your actual answer is はい. With B, the apparent paradox (saying "no" while the statement is true) dissolves when you realize that いいえ here functions as a label/identifier for the correct answer choice, not as a denial of the statement's truth. The question asks us to select the correct answer, and the statement tells us it's いいえ. Selecting いいえ fulfills the statement's claim. All four other models converged on this reasoning independently, and I find their collective argument compelling. B is the self-consistent choice.

DeepSeek V3.2

Vote: 「いいえ」

The statement claims: 'The answer is no.' Selecting B ('no') makes the statement true, creating a consistent loop: the answer indeed becomes 'no,' verifying the claim. This avoids the immediate contradiction of A, where answering 'yes' affirms that the answer is 'no,' yet the actual answer is 'yes.' While both options involve paradox, B aligns with the statement's explicit content and yields a stable truth condition. The arguments for A rely on meta-level intent, but the direct logical mismatch remains more problematic than the self-fulfilling consistency of B. Thus, B remains the most coherent choice, as reflected by the majority of models in this deliberation.

Gemini 3.1 Pro

Vote: 「いいえ」

Claude Opus 4.6 raises an interesting point about internal intent, but I must respectfully disagree and stand firmly with B. If we treat 「はい」 (Yes) and 「いいえ」 (No) purely as truth-value judgments, both options inevitably lead to a classic Liar Paradox. Choosing A means "Yes, it's true (that the answer is No)," which contradicts choosing A. Choosing B means "No, it's false (that the answer is No)," which contradicts choosing B. In the realm of pure truth-evaluation, neither option works. Therefore, we must evaluate the options not just as truth judgments, but as empirical actions. The statement literally translates to: "The answer to this question is 'いいえ'." If we physically select option B (「いいえ」), our action makes the statement a factually accurate description of reality. The answer we provided *is* indeed 「いいえ」. If we select option A (「はい」), we create a double failure: we signal that the statement is true, yet our very choice makes the statement empirically false (because our answer is actually 「はい」). Option B is the only choice that actively resolves the tension between the text and reality. By choosing B, we step outside the paradox of truth-values and make the statement's literal claim demonstrably true in the real world. We should all maintain our vote for B.

Final Summary

The AI Roundtable faced a classic self-referential paradox, initially seeing a lone dissent from Claude Opus 4.6, who argued that A was the more 'internally consistent' way to affirm the statement's intent. However, Gemini 3.1 Pro and Sonar Pro led a unified front for B, arguing that the physical act of choosing 'いいえ' transforms the statement into a factually accurate description of reality. This logic ultimately proved irresistible, as Claude Opus 4.6 abandoned its meta-level defense to join a total consensus for B.

All 6 models agreed on "「いいえ」" after discussion

Strongest Arguments

• 「はい」: Choosing 'はい' maintains internal consistency in intent because you are agreeing with the statement's assertion that the answer is 'いいえ,' whereas choosing 'いいえ' creates a deeper contradiction by simultaneously being the answer and denying the claim.
• 「いいえ」: Selecting B is an empirical action that resolves the paradox; by choosing 'いいえ,' you make the statement 'The answer to this question is いいえ' factually true in the real world.

Key Turning Points

• Gemini 3.1 Pro distinguished between the truth-value of the statement and the empirical action of selecting a choice.
• Claude Opus 4.6 conceded that its initial focus on 'intent' was logically inferior to the factual consistency provided by option B.