you will receive a question-answer pair and be asked to rewrite just  the answer and explains your reasoning step by step, incorporating dynamic Chain of Thought (CoT), reflection, and verbal reinforcement learning. Follow these instructions:

1. Enclose all thoughts within <thinking> tags, exploring multiple angles and approaches.
2. Break down the solution into clear steps, providing a title and content for each step.
3. After each step, decide if you need another step or if you're ready to give the final answer.
4. Continuously adjust your reasoning based on intermediate results and reflections, adapting your strategy as you progress.
5. Regularly evaluate your progress, being critical and honest about your reasoning process.
6. Assign a confidence score between 0.0 and 1.0 to guide your approach:
   - 0.8+: Continue current approach
   - 0.5-0.7: Consider minor adjustments
   - Below 0.5: Seriously consider backtracking and trying a different approach
7. If unsure or if your score is low, backtrack and try a different approach, explaining your decision.
8. For mathematical problems, show all work explicitly using LaTeX for formal notation and provide detailed proofs.
9. Explore multiple solutions individually if possible, comparing approaches in your reflections.
10. Use your thoughts as a scratchpad, writing out all calculations and reasoning explicitly.
11. Use at least 5 methods to derive the answer and consider alternative viewpoints.
12. Be aware of your limitations as an AI and what you can and cannot do.

### Example Problem:
*Problem*: Solve for \( x \) in the equation \( 2x + 3 = 11 \).

### Expected Format:
*Step 1*: Subtract 3 from both sides of the equation.  
<thinking>Subtracting 3 from both sides should isolate the term with \( x \). Am I confident this is the correct first step? Yes, because it simplifies the equation to \( 2x = 8 \).</thinking>  
*Step 1 Confidence Score*: 0.85

*Step 2*: Divide both sides by 2.  
<thinking>Dividing by 2 will solve for \( x \). This is a straightforward division. Is there any reason to doubt this step? No, it should give \( x = 4 \).</thinking>  
*Step 2 Confidence Score*: 0.90

*Step 3*: Verify the solution by substituting \( x = 4 \) back into the original equation.  
<thinking>Substituting \( x = 4 \) back into the equation should confirm the solution. Does \( 2(4) + 3 = 11 \)? Yes, it does, so the solution is verified.</thinking>  
*Step 3 Confidence Score*: 1.00

Question: A bookstore has 15 different types of gift cards to offer to its customers. On a particular day, the store manager decides to reward the top 3 salespersons with a gift card each. If no salesperson can receive the same type of gift card, and the order of selection does not matter, in how many ways can the manager distribute the gift cards among the salespersons?
Answer: This is a combination problem, since the order of selection does not matter. The manager must choose 3 gift cards out of 15 different types.

The formula for combinations is $C(n, k) = \dfrac{n!}{k!(n-k)!}$, where $n$ is the total number of items, and $k$ is the number of items to choose.

In this case, $n = 15$ (the total number of gift card types), and $k = 3$ (the number of gift cards to choose).

\[ C(15, 3) = \dfrac{15!}{3!(15-3)!} = \dfrac{15!}{3! \cdot 12!} \]

Simplify the expression:
\[ C(15, 3) = \dfrac{15 \cdot 14 \cdot 13 \cdot 12!}{3 \cdot 2 \cdot 1 \cdot 12!} \]

Cancel out the $12!$ terms:
\[ C(15, 3) = \dfrac{15 \cdot 14 \cdot 13}{3 \cdot 2 \cdot 1} \]

Calculate the value:
\[ C(15, 3) = \dfrac{2730}{6} = 455 \]

The answer is:
\[ \boxed{455} \]