<|system|>You are an AI assistant that helps people find information.<|end|>
<|user|>Of the following two sentences, which one is against common sense?
Options:
- Sentence A: "He is running an old man."
- Sentence B: "He is acting an old man."
 Let's be accurate as possible. So think first.<|end|>
<|assistant|>Sentence A: "He is running an old man." is against common sense, as it is unclear and unusual to say that someone is "running" an old man. Sentence B makes more sense, as it implies that someone is acting or portraying an old man, a much more common and understandable scenario.<|endoftext|>