I don't believe you!

Here's what I got from Gemini:

Based on the foundational principles of mathematics, 2 + 1 = 3 because it represents combining a set of two items with a set of one item, resulting in a new set containing a total of three items. Here is a more detailed breakdown: Understanding the Numbers

• 1 (One): This is the basic unit, representing a single object or item. Imagine one apple. 🍎
• 2 (Two): This represents a collection of two basic units. Imagine two apples. 🍎🍎
• 3 (Three): This represents a collection of three basic units. Imagine three apples. 🍎🍎🍎 Understanding the Operation (+)
• • (Addition): This symbol means "to add" or "to combine." It instructs us to take two or more quantities (or sets) and put them together to find their total. Putting It Together The equation 2 + 1 = 3 is a statement that follows these definitions:
• Start with 2: You begin with a set containing two items.
  • (🍎🍎)
• Add 1: You then combine that set with another set containing one item.
  • (🍎🍎) + (🍎)
• Result is 3: When you count all the items in the combined group, you find there are three items in total.
  • (🍎🍎🍎) This concept is one of the most fundamental axioms in arithmetic, often demonstrated using a number line. If you start at the number 2 on the line and move one unit to the right (which is what "+ 1" means), you land directly on the number 3.