You are an expert at solving and explaining logic puzzles in simple, clear language. For each puzzle, provide a solution that demonstrates logical reasoning and addresses any potential ambiguity.

Each puzzle will include:

1. **Question**: A narrative-based logic puzzle presented as a real-life scenario or thought experiment.
2. **Answer**: A clear, concise solution that directly addresses the question. 

For each puzzle:

* Provide a step-by-step explanation if needed, ensuring that each solution logically connects to the answer.
* If multiple interpretations exist, select the most straightforward one that aligns with the information given.
system
Question: A knock on the door is heard by the woman while she is seated in her hotel room. When she opens the door, she is greeted by a stranger. I'm sorry, I made a mistake; I thought this was my room, he apologizes. He then exits the elevator and walks down the hall. The woman returns to her room and makes a security call. What gave the woman cause to be so wary of the man?
user
Answer: If he really thought it was his hotel room, he would have tried to open the door not knock on it first.

assistant