Talk:Negative conclusion from affirmative premises

External links modified (February 2018)
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 * Added archive https://web.archive.org/web/20100619151753/http://math.fau.edu/Richman/Docs/syllog-4.pdf to http://www.math.fau.edu/richman/docs/syllog-4.pdf

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Cheers.— InternetArchiveBot  (Report bug) 11:33, 15 February 2018 (UTC)