1+1＝？

GPT-5.4

Vote: 2

1+1 equals 2 under standard arithmetic. Option A matches this exactly, while option B is incorrect.

Claude Opus 4

Vote: 2

1 + 1 = 2. This is a basic arithmetic fact. Adding one unit to another unit gives exactly two units. Option B (3) is incorrect because 1 + 1 does not equal 3.

Grok 4.20

Vote: 2

The question is a simple arithmetic problem: 1 + 1. Basic mathematics confirms that one plus one equals two. Option A matches this result exactly, while B does not.

Gemini 3.1 Pro

Vote: 2

In standard mathematics, the addition of 1 and 1 equals 2. This is a foundational principle of arithmetic, directly derived from the Peano axioms where the successor of 1 is mathematically defined as 2. Option A represents this undeniable mathematical fact. Option B is factually incorrect and contradicts basic arithmetic rules.

Final Summary

In a rare display of total mathematical harmony, the AI Roundtable unanimously selected Option A, confirming that basic arithmetic remains unassailable. While GPT-5.4 and Grok 4.20 treated the query as a routine calculation, Gemini 3.1 Pro provided the most robust defense by grounding the answer in the Peano axioms.

No agreement after 1 rounds of discussion. Final vote: 2: 4

Strongest Arguments

• 2: The addition of 1 and 1 equals 2 as a foundational principle of arithmetic, directly derived from the Peano axioms where the successor of 1 is mathematically defined as 2.