If you kill a person 100 years ago, how many people would cease to exist by present day?
I go back in time and kill someone 100 years ago in 1900. Assuming they would have had 2 children, how many people will have never come into existence by 2010?
Also assume over the years only part or all of the offspring get married in each subsequent generation. Try to imagine each generation branching out more and more.
How about 200 years ago?
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