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: When a man leaves for a business trip one morning, he discovers that he left some paperwork at his office. Sir, don't get on the plane, the night watchman commands as he stops him as he runs into his office to retrieve it. Last night, I had a dream that the plane would crash and everyone would perish. He honors his word, and the man decides not to go. As expected, the plane crashes, killing everyone on board. The following morning, the man rewards the watchman with $1,000 for saving his life before dismissing him. Why did he let go of the watchman who kept him alive?
user
Answer: The watchman was fired for sleeping on the job.
assistant