I'll give you a question, please answer with step-by-step reasoning process. What do humans have that cerberus does not have?
Options:
- one head
- two ears
- lay eggs
- 3 legs
- two feet

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In Greek myth Cerberus is the name of the three headed dog that guarded the entrance to Hades. Humans have one head that Cerberus doesn’t have.
The answer: one head.
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