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    What happens is that the new mean intelligence is 150+ (as by the
    old scale), turning into a new normal distribution. (I ran a quick
    Matlab test). <br>
    <br>
    What is going on is that the intelligence is due to a lot of genes
    adding about 1% or less each, so removing the <150 IQ population
    mainly removes some very bad genes and decreases the somewhat bad
    genes: there is still a lot of genetic diversity. So the new mean
    goes up, but the variance stays about the same. <br>
    <br>
    <div class="moz-cite-prefix">On 2015-09-10 23:15, William Flynn
      Wallace wrote:<br>
    </div>
    <blockquote
cite="mid:CAO+xQEaXWPQ0kKN_MYE3GMFxh=94nz64SqaZ0Xc6aD26VumvEQ@mail.gmail.com"
      type="cite">
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          <div class="gmail_quote">On Thu, Sep 10, 2015 at 4:46 PM, Mike
            Dougherty <span dir="ltr"><<a moz-do-not-send="true"
                href="mailto:msd001@gmail.com" target="_blank">msd001@gmail.com</a>></span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex"><span
                class="">On Thu, Sep 10, 2015 at 4:12 PM, William Flynn
                Wallace<br>
                <<a moz-do-not-send="true"
                  href="mailto:foozler83@gmail.com">foozler83@gmail.com</a>>
                wrote:<br>
                > If all people with IQs below 150 became sterile,
                would the gene pool that<br>
                > was left eventually create a population averaging
                100 IQ?<br>
                <br>
              </span>Yes, because the 'average' is 100.  That may be an
              order of magnitude<br>
              more capable, it would still be measured as 100.<br>
              <br>
              In order words, you would effectively lower the IQ of
              every survivor,<br>
              <br>
              "lies, damned lies, statistics"<br>
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                ms,sans-serif;font-size:small;color:rgb(0,0,0);display:inline">​
                well, yes, I suppose I worded that awkwardly.  What I
                meant was, would the mental ability of the average
                person who survived eventually regress to the mental
                ability we now call IQ 100?  I don't know enough
                genetics to answer that. bill w​</div>
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    <br>
    <pre class="moz-signature" cols="72">-- 
Anders Sandberg
Future of Humanity Institute
Oxford Martin School
Oxford University</pre>
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