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62![Modus ponens, modus tollens, e respectivas falácias formais Jerzy A. Brzozowski Modus ponens, modus tollens, e respectivas falácias formais Jerzy A. Brzozowski](https://www.pdfsearch.io/img/9fcc8c8c91b2e8b04df94009fab3e91f.jpg) | Add to Reading ListSource URL: jerzy.cfh.prof.ufsc.brLanguage: Portuguese - Date: 2011-04-28 17:25:02
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63![](https://www.pdfsearch.io/img/7fb533a89fc02c9ba5f1b115710049da.jpg) | Add to Reading ListSource URL: www.math.utk.eduLanguage: English - Date: 2011-02-09 09:27:58
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64![](https://www.pdfsearch.io/img/20133af2ed91c352ab024bc2df2d9815.jpg) | Add to Reading ListSource URL: www.let.uu.nlLanguage: English - Date: 2009-03-16 13:46:32
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65![](https://www.pdfsearch.io/img/18c4e3e7bed388e7d7561523fe0878ae.jpg) | Add to Reading ListSource URL: www.danielclemente.comLanguage: English - Date: 2005-05-17 18:34:22
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66![](https://www.pdfsearch.io/img/10c6fbd2e9c9512cb10ce340fd70bc46.jpg) | Add to Reading ListSource URL: www.columbia.eduLanguage: English - Date: 2001-03-22 12:57:27
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67![](https://www.pdfsearch.io/img/d3779227368a54651e2f97ebc25622ed.jpg) | Add to Reading ListSource URL: suppes-corpus.stanford.eduLanguage: English - Date: 2008-09-09 20:50:02
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68![](https://www.pdfsearch.io/img/896ce83b6e55935ae09ffb5a1f6f773c.jpg) | Add to Reading ListSource URL: homepages.inf.ed.ac.uk- Date: 2008-01-07 09:35:14
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69![](https://www.pdfsearch.io/img/32ec4a7751e608254637898a08acec08.jpg) | Add to Reading ListSource URL: comet.lehman.cuny.eduLanguage: English - Date: 2013-07-15 12:32:40
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