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'''Richard the Sophister''' (Richardus Sophista) was an English philosopher/logician who studied at Oxford most likely sometime during the second quarter of the thirteenth century. Richard's identity is uncertain, but he is known to be the author of a collection of logically puzzling sentences, sometimes called “sophisms”, entitled Abstractiones, hence his title ''Magister Abstractionum''.

'''Richard the Sophister''' (Richardus Sophista) was an English philosopher/logician who studied at Oxford most likely sometime during the second quarter of the thirteenth century. Richard's identity is uncertain, but he is known to be the author of a collection of logically puzzling sentences, sometimes called “sophisms” or [[sophismata]], entitled Abstractiones, hence his title ''Magister Abstractionum''.

== Life ==

== Life ==

* Ms D = Oxford, Bodleian Library, Digby 24  

* Ms D = Oxford, Bodleian Library, Digby 24  

* Ms K = København, Det Kongelige Bibliotek, Fragm.1075  

* Ms K = København, Det Kongelige Bibliotek, Fragm.1075  

* Ms O = Oxford, Bodleian Library, Digby 2  

* Ms O = [[Directory:Logic Museum/Oxford. Bodleian. Digby. 2|Oxford, Bodleian Library, Digby 2]]

* Ms P = Paris, Bibliothèque Nationale lat. 14069  

* Ms P = Paris, Bibliothèque Nationale lat. 14069  

* Ms R = London, British Library, Royal 12.F.xix  

* Ms R = London, British Library, Royal 12.F.xix

 

==Secondary sources ==

==Secondary sources ==

* Raedts, Peter, 1987, [[Richard Rufus of Cornwall]] and the Tradition of Oxford Theology, Oxford.  

* Raedts, Peter, 1987, [[Richard Rufus of Cornwall]] and the Tradition of Oxford Theology, Oxford.  

* Read, Stephen (ed.), 1993, Sophisms in Medieval Logic and Grammar, Acts of the 8th European Symposium for Medieval Logic and Semantics, Kluwer.  

* Read, Stephen (ed.), 1993, Sophisms in Medieval Logic and Grammar, Acts of the 8th European Symposium for Medieval Logic and Semantics, Kluwer.  

* de Rijk, L. M., 1962-67, Logica Modernorum, I-II, van Gorcum, Assen.  

* [[Directory:Logic Museum/Lambertus Marie de Rijk|de Rijk, L. M.]], 1962-67, Logica Modernorum, I-II, van Gorcum, Assen.  

* -----, 1974, “Some Thirteenth Century Tracts on the Game of Obligation,” Vivarium 12.  

* -----, 1974, “Some Thirteenth Century Tracts on the Game of Obligation,” Vivarium 12.  

* -----, 1985, “Walter Burley's Tract ‘de Exclusivis’. An Edition,” Vivarium 23, 23-54.  

* -----, 1985, “Walter Burley's Tract ‘de Exclusivis’. An Edition,” Vivarium 23, 23-54.  

* -----, 1986, “Walter Burley's Tract ‘de Exceptivis’. An Edition,” Vivarium 24, 22-49.  

* -----, 1986, “Walter Burley's Tract ‘de Exceptivis’. An Edition,” Vivarium 24, 22-49.  

* Spade, Paul Vincent, 1982, “Obligations: Developments in the Fourteenth Century” in Kretzmann, et al. 1982.  

* [[Directory:Logic Museum/Paul Vincent Spade|Spade, Paul Vincent]], 1982, “Obligations: Developments in the Fourteenth Century” in Kretzmann, et al. 1982.  

* Stump, Eleonore, 1982, “Obligations: From the Beginning to the Early Fourteenth Century” in Kretzmann, et al. 1982.  

* Stump, Eleonore, 1982, “Obligations: From the Beginning to the Early Fourteenth Century” in Kretzmann, et al. 1982.  

* Streveler, Paul A., 1993, “A Comparative Analysis of the Treatment of Sophisms in MSS Digby 2 and Royal 12 of the Magister Abstractionum,” in Read 1993.

* Streveler, Paul A., 1993, “A Comparative Analysis of the Treatment of Sophisms in MSS Digby 2 and Royal 12 of the Magister Abstractionum,” in Read 1993.