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Stop generation immediately after outputing the Final Answer.

Ensure that your response strictly follows the format to maintain clarity and consistency. 
Question: Here are some premises:
Some mammals have teeth.
Platypuses have no teeth.
Platypuses are mammals. 
Humans have teeth.
Here is a conclusion:
Platypuses are reptiles.
Based on the premises, is the conclusion True, False, or Uncertain?
Answer: Uncertain