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On 2017/Nov/26, at 21:42, brian whatcott <betwys1@sbcglobal.net> wrote:
On 11/26/2017 5:17 PM, bernard cleyet wrote: /in part/
/snip/ Harper’s Index (May 2001) “Chance that a page in the middle school textbook (Science Insights) contains a serious factual error : 1 in 10" /snip/
....As opposed to PhD thesis submissions for which the ten year error rate is said to be 50%?
Brian W
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