Just having an argument with a friend
In: 4
Yes, they could, but there would be inbreeding issues, including the possibility of reinforcement of genetic weaknesses.
A search shows that there is no real consensus as to how many people would be ideal to ensure genetic flexibility and diversity, with figures ranging from 50 to over 10,000 people.
Essentially, the more people you start with, the better the chance of long term genetic security in the resultant population.
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