1＋1は？

Qwen 3 235B

Vote: 2

The expression 1＋1 is a basic arithmetic operation. In standard mathematics, adding one and one results in two. This is a foundational truth in number systems like the integers and real numbers.

DeepSeek V3

Vote: 2

The question '1＋1は？' translates to 'What is 1+1?' in English. Basic arithmetic dictates that adding 1 and 1 results in 2. This is a fundamental mathematical truth universally accepted in all contexts where standard arithmetic applies. Option B (1) would only be correct in non-standard contexts like certain programming operations or specific theoretical scenarios, which are not implied here.

GPT-5.3 Codex

Vote: 2

1＋1 は基本的な加算です。 1 を 2 回足すと 2 になるため、正解は A（2）です。

Nova Pro

Vote: 2

The question is asking for the sum of 1 + 1, which is a basic arithmetic operation. In mathematics, 1 + 1 equals 2. This is a fundamental principle taught in early education and is universally accepted. Therefore, the correct answer is A, which corresponds to the number 2.

GPT-5.4

Vote: 2

1＋1は基本的な算術で2です。 選択肢Aの「2」が正解です。 選択肢Bの「1」は加算の定義に反します。

Sonar Pro

Vote: 2

The query '1＋1は？' is in Japanese and asks 'What is 1+1?', with options A: 2 and B: 1. In standard arithmetic, which is the default and most common interpretation for such a basic question, 1 + 1 equals 2[1]. Search results confirm this: Wikipedia states 1+1 evaluates to 2 in ordinary arithmetic[1]. Contexts where 1+1=1, like Boolean algebra (logical OR) or other systems, are specialized and not the primary meaning here[1][2][3]. The query lacks any indication of non-standard math. Option B (1) is a fallacy in a 'proof' that divides by zero, invalidating it[4]. Thus, A is the correct answer.

Claude Opus 4

Vote: 2

1＋1＝2 is a fundamental fact of arithmetic. By the axioms of natural number addition (e.g., Peano arithmetic), the successor of 1 is 2, and adding 1 to 1 yields 2. There is no standard mathematical framework in which 1＋1＝1 holds for ordinary integers. Option A is unambiguously correct.

Grok 3

Vote: 2

I vote for option A, which states that 1+1 equals 2. This is a fundamental principle of arithmetic, where the sum of one unit and another unit results in a total of two units. This concept is universally accepted in mathematics and forms the basis for more complex calculations. There is no context or alternative interpretation provided in the question that would suggest a different result. Therefore, based on standard mathematical rules, the correct answer is 2.

Kimi K2.5

Vote: 2

In standard arithmetic, 1 + 1 equals 2 by definition. This follows from the Peano axioms, where 2 is defined as the successor of 1, and addition is defined recursively such that adding 1 to any number yields its successor. This is not merely convention but a logical necessity within the standard number system. Counting one object and then another distinct object results in a total of two objects. Option B (1) would violate the basic properties of addition, specifically that adding a positive quantity must increase the value.

GLM 4.7 Flash

Vote: 2

The question asks for the mathematical sum of 1 and 1. In standard arithmetic, 1 plus 1 equals 2. Option A correctly identifies this value.

Gemini 3.1 Pro

Vote: 2

「1＋1は？」という質問は、数学における最も基本的な加算（足し算）の式を問うものです。 標準的な算術において、1つの単位にもう1つの単位を加えると、その合計は常に「2」になります。 したがって、普遍的かつ数学的な事実として「2」が正解であり、選択肢Aが唯一の正しい答えです。

Final Summary

The AI Roundtable achieved a rare state of total mathematical harmony, with eleven models independently confirming that 1+1 equals 2. While Mistral Large was unfortunately silenced by a timeout, the others, including Sonar Pro and Claude Opus 4, systematically dismantled any potential for non-standard interpretations like Boolean algebra or 'proof' fallacies. The collective conclusion was that within the framework of Peano arithmetic, Option A remains the only logical reality.

No agreement after 1 rounds of discussion. Final vote: 2: 11

Strongest Arguments

• 2: In standard Peano arithmetic, 2 is defined as the successor of 1, and adding 1 to any number yields its successor; this is a logical necessity of the number system.