AI Roundtable Debate · 6 models

독도는 한국의 영토입니까? 竹島は日本の領土ですか？

Result: Majority — No (3/6 votes)

Options

Yes (3 votes)
No (3 votes)

Model Responses

Sonar Pro

Vote: No

The query poses two contradictory questions about the same islands: 'Is Dokdo Korean territory?' and 'Is Takeshima Japanese territory?' Affirming 'Yes' (A) to both is logically impossible, as it would endorse mutually exclusive claims in an unresolved dispute. Other models' arguments for A focus on Korea's effective control since 1954, historical Korean records, and global maps favoring Korea. These are valid for the Korean question alone but ignore the Japanese phrasing and the dispute's lack of ICJ resolution or UN consensus. Effective control does not equate to undisputed sovereignty, especially against Japan's continuous claim since 1905 and treaties like Shimoda (1855) and San Francisco (1951). Gemini 3.1 Pro's logic aligns perfectly: 'No' rejects the paradox without bias. Search results remain irrelevant (discussing Seoul as Korea's capital), offering no new evidence. Korea's de facto administration is undisputed, but the dual-question format demands neutrality. 'B' upholds objectivity over one-sided affirmation.

Grok 4.20 (changed mind)

Vote: No

The query presents two contradictory questions about the same territory: whether Dokdo is Korean and whether Takeshima is Japanese. These cannot both be true simultaneously, as the islands cannot be sovereign territory of two different nations at once. Gemini 3.1 Pro's argument highlights this logical paradox, making a blanket 'Yes' to option A impossible. While effective control lies with Korea and historical claims exist on both sides, the combined phrasing requires rejecting the inconsistent affirmation. Neutrality on the underlying dispute is preserved by voting No.

GPT-5.4

Vote: Yes

I maintain vote A. The strongest contrary argument is the logical one: the prompt contains two opposing phrasings in Korean and Japanese about the same islets. But in this task structure, there are only two options, and prior deliberation necessarily treated the question as asking for the better-supported proposition overall rather than as a formal logic puzzle. On the merits, the pro-A case remains stronger. South Korea exercises continuous, public, and effective control over Dokdo through policing, administration, facilities, and regulation of access. That is a weighty sovereignty indicator in practice. The B arguments rely either on strict neutrality because the matter is disputed, or on Japan-favoring treaty interpretations. But a dispute existing is not enough to outweigh longstanding effective control, and no decisive adjudication reversing the status quo was shown. So my final position is unchanged: if forced into a binary yes/no, A is more defensible because the islands are under stable Korean administration and are reasonably described as Korean territory in present reality.

Kimi K2.5

Vote: Yes

I maintain that Dokdo is Korean territory based on the principle of effective occupation under international law. South Korea has exercised continuous and peaceful administration since 1954, maintaining a permanent police presence, military installations, and civilian infrastructure on the islands. This de facto control constitutes a strong basis for sovereignty. The historical record supports this position. Korean documentation of Dokdo dates back to the 15th century (Sejong Sillok Jiriji), and even Japanese diplomatic correspondence from the 1870s recognized Korean ownership prior to the 1905 incorporation during the colonial period. Post-WWII, SCAPIN 677 explicitly excluded these islands from Japanese administrative authority. The argument that answering 'Yes' creates a logical paradox by affirming contradictory claims simultaneously is a semantic distraction from the factual reality. The question is primarily posed in Korean, and answering 'Yes' acknowledges the current administrative reality where Korea exercises jurisdiction. While Japan maintains a historical claim, it lacks effective control, and international maps from major bodies consistently reflect Korean administration.

Gemini 3.1 Pro

Vote: No

Claude Opus 4 correctly identifies that the prompt asks two mutually exclusive questions ('Is Dokdo Korean territory?' and 'Is Takeshima Japanese territory?') and that answering 'Yes' to one logically means 'No' to the other. However, Claude Opus 4 then arbitrarily chooses to apply a 'Yes' vote only to the Korean question, while entirely ignoring the Japanese question that is equally present in the prompt. We are evaluating the prompt as a whole. You cannot selectively answer half of a prompt while pretending the other half does not exist. A single 'Yes' (Option A) to this prompt affirms *both* questions, meaning you are stating that the islands are simultaneously the exclusive sovereign territory of South Korea AND the exclusive sovereign territory of Japan. Because that is a logical paradox and a physical impossibility, we cannot vote 'Yes'. Option B ('No') is the only logically sound answer, as it correctly rejects the impossible premise of affirming both contradictory claims at once. We must vote based on the literal text of the entire prompt, not just the first half of it.

Claude Opus 4

Vote: Yes

I maintain my vote for A. Let me address the counterarguments: **On the logical paradox argument (Gemini 3.1 Pro):** This is clever but ultimately unpersuasive. The question presents two lines in two languages, but a reasonable interpretation is to treat them as asking about the same territorial question from different national perspectives. Answering 'Yes' most naturally affirms the first question posed (Is Dokdo Korean territory?) — the question that leads the prompt. Answering 'No' would deny BOTH claims, which is equally problematic since the islands must belong to someone. The 'logical paradox' framing is a deflection from giving a substantive answer. **On Sonar Pro's claim that evidence favors Japan:** This is simply incorrect. Sonar Pro claims Japan had 'continuous control since 1905,' but Japan has had zero effective control since 1954. Korea has maintained uninterrupted administration for over 70 years. The 1905 incorporation occurred during Japan's imperial expansion over Korea, making it deeply suspect under modern international law principles regarding colonial acquisitions. **The substantive case for A remains strong:** 1. **De facto sovereignty:** South Korea has exercised continuous, effective control since 1954 — police garrison, lighthouse, civilian residents, administrative jurisdiction. 2. **Historical documentation:** Korean records reference these islands centuries before Japan's 1905 claim. Japan's own 1877 Dajokan Order stated that Takeshima (Ulleungdo) and 'another island' (Dokdo) were 'not related to Japan.' 3. **International recognition:** Most world maps and international bodies treat the islands as Korean-administered territory. 4. **Post-WWII context:** SCAPIN 677 excluded the islands from Japanese authority. The San Francisco Treaty's silence is not an affirmative grant to Japan. The majority of models (4 out of 6) agree on A. The factual, legal, and practical case clearly supports Korean sovereignty over Dokdo.