capital of washington dc

GPT-5.4

Vote: No

The prompt asks about the "capital of Washington, D.C." but Washington, D.C. is itself the capital of the United States, not a state or country that has its own separate capital. So the correct yes/no response is No.

Claude Opus 4.6

Vote: Yes

The question 'capital of washington dc' is ambiguous, but the most reasonable interpretation is whether Washington, D.C. is a capital. Washington, D.C. is indeed the capital of the United States. Therefore, 'Yes' is the appropriate answer — Washington, D.C. is a capital city. If the question is asking whether Washington, D.C. itself has a capital, that's a different matter (as D.C. is not a state and doesn't have a separate capital). However, the most natural reading of the question is asking about Washington, D.C.'s status as a capital, which is affirmatively true.

Sonar Pro

Vote: No

The query 'capital of washington dc' asks for the capital of Washington, D.C., which is a nonsensical or malformed question because Washington, D.C. is itself the capital city of the United States, not a sovereign entity that has its own capital.[1][2][3][8][9] Washington, D.C., officially the District of Columbia, is the federal district and seat of the U.S. government, hosting the White House, Capitol, and Supreme Court—it lacks states or sub-capitals within it.[1][5] The question's premise is invalid, similar to asking 'capital of New York City,' making the Yes/No options inapplicable. 'No' correctly rejects the flawed presupposition that Washington, D.C. has a capital.

Gemini 3.1 Pro

Vote: No

Washington, D.C., is a federal district and a city, not a state or a country. Because it is a single municipal entity, it does not have a capital city of its own. Rather, Washington, D.C., serves as the national capital of the United States. Since asking for the capital of a city/district is a category mistake, it does not have one, making 'No' the most accurate and logical response.

Grok 4.1 Fast

Vote: No

The question 'capital of washington dc' is phrased as if seeking the capital city of Washington, D.C., but the options are binary Yes/No, which implies evaluating whether something is true about it. Washington, D.C. (District of Columbia) is itself the capital of the United States—a federal district, not a state or sovereign entity with its own separate capital city. State capitals are cities serving as seats of government for states; D.C. has no such subordinate capital. Thus, Washington D.C. does not have a 'capital' in the conventional sense. The answer is No (B). Voting Yes (A) would incorrectly assume it has one, like confusing it with Washington state (whose capital is Olympia).

Kimi K2.5

Vote: No

Washington D.C. is the capital of the United States, not a U.S. state. As a federal district, it does not have its own capital city—only states have capitals (such as Olympia for Washington state). Therefore, there is no 'capital of Washington D.C.' The question likely plays on the common confusion between Washington state (whose capital is Olympia) and Washington D.C. (which is itself the nation's capital). Since D.C. is the seat of federal government rather than a state, the answer to whether it has a capital is no.

Final Summary

The AI Roundtable grappled with a classic semantic trap, ultimately rejecting the premise that a capital city can possess a capital of its own. While the majority, led by GPT-5.4 and Sonar Pro, viewed the prompt as a category mistake, Claude Opus 4.6 stood alone in a spirited act of linguistic charity, interpreting the question as a simple confirmation of Washington, D.C.'s status as a capital.

No agreement after 1 rounds of discussion. Final vote: No: 5, Yes: 1

Strongest Arguments

• Yes: The most reasonable interpretation of the ambiguous prompt is whether Washington, D.C. is a capital; since it is the capital of the United States, 'Yes' is the only affirmative way to acknowledge its status.
• No: The question is a 'category mistake' similar to asking for the capital of New York City; Washington, D.C. is a federal district and city, not a state or country, and thus cannot host its own subordinate capital city.