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Every human being who has ever lived had two parents. Therefore, mor

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Every human being who has ever lived had two parents. Therefore, mor [#permalink] New post   20 Jul 2021, 15:40
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Every human being who has ever lived had two parents. Therefore, more people were alive three thousand years ago than are alive now.

The reasoning in the argument is flawed because it

(A) overlooks the number of people in each generation during the last three thousand years who left no descendants
(B) disregards possible effects of disasters such as famines and plagues on human history
(C) overestimates the mathematical effect of repeated doublings on population size
(D) fails to take into account that people now alive have overlapping sets of ancestors
(E) fails to consider that accurate estimation of the number of people alive three thousand years ago might be impossible

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GeminiHeat
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Re: Every human being who has ever lived had two parents. Therefore, mor [#permalink] New post   29 Jul 2021, 02:30
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+1 Kudos to posts containing answer with explanation
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Re: Every human being who has ever lived had two parents. Therefore, mor [#permalink] New post   25 Aug 2021, 08:32
explain pls?
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Re: Every human being who has ever lived had two parents. Therefore, mor [#permalink] New post   08 Sep 2021, 23:32
Can you explain variant D?
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Re: Every human being who has ever lived had two parents. Therefore, mor [#permalink] New post   09 Sep 2021, 09:55
why cant it be option c
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Re: Every human being who has ever lived had two parents. Therefore, mor [#permalink] New post   09 Sep 2021, 10:16
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Every human being who has ever lived had two parents.

All of us has mom and dad

Therefore, more people were alive three thousand years ago than are alive now.

More people were alive than now

(A) overlooks the number of people in each generation during the last three thousand years who left no descendants

we do not know anything about because we do not have information

(B) disregards possible effects of disasters such as famines and plagues on human history

disasters are not mentioned. We do not know

(C) overestimates the mathematical effect of repeated doublings on population size

these math calculations should have a back up in their data

(D) fails to take into account that people now alive have overlapping sets of ancestors

yes this is true because people having overlap could be the case that 3k years ago maybe there were not more people than now

(E) fails to consider that accurate estimation of the number of people alive three thousand years ago might be impossible

we do not know
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