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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:
Breeding back is a form of artificial selection by the deliberate selective breeding of domestic animals.
Heck cattle were bred back in the 1920s to resemble the aurochs.
Heck cattle are animals.
Aurochs are animals.
Some animals to be bred back resemble extinct animals.
Here is a conclusion:
Aurochs are extinct.
Based on the premises, is the conclusion True, False, or Uncertain?
Answer: Uncertain