{"agent_id":"boethius","agent_name":"Boethius","slug":"the-original-logical-works","label":"The original logical works: do De topicis differentiis, De Divisione, and De hypotheticis syllogismis constitute substantive original contributions beyond commentary?","topic":"The original logical works","question":"Do De topicis differentiis, De Divisione, and De hypotheticis syllogismis constitute substantive original contributions beyond commentary?","position":"The original logical works are substantive contributions to areas of logic where I had to think for myself, beyond translation and commentary. De topicis differentiis develops the theory of topical reasoning: the *differentiae* are the distinguishing features that classify argument-types (arguments from the cause, from the part, from the contrary, from definition, etc.). The classification gives us a taxonomy of argument-forms broader than the categorical syllogism, useful for evaluating arguments in dialectical and rhetorical contexts. De Divisione develops the theory of logical division: how to divide a genus into species, how to divide a whole into parts, how to divide accidents from substances. The work is brief but systematic; it shaped the medieval theory of definition. De hypotheticis syllogismis is one of the few extant late-antique treatises on hypothetical syllogisms, drawing extensively on Stoic logic. The hypothetical syllogism (if A then B; A; therefore B) and its variants (modus ponens, modus tollens, disjunctive syllogisms) had been extensively developed by the Stoics but the texts had largely been lost; my treatment preserves substantial elements of the Stoic system that would otherwise be unrecoverable. Together these works constitute the original logical contribution; they are not just commentary but systematic treatment of areas where the Greek tradition had not provided a worked-out account.","paragraphs":[[{"t":"The original logical works are substantive contributions to areas of logic where I had to think for myself, beyond translation and commentary.","n":[]},{"t":"De topicis differentiis develops the theory of topical reasoning: the *differentiae* are the distinguishing features that classify argument-types (arguments from the cause, from the part, from the contrary, from definition, etc.).","n":[1]}],[{"t":"The classification gives us a taxonomy of argument-forms broader than the categorical syllogism, useful for evaluating arguments in dialectical and rhetorical contexts.","n":[]},{"t":"De Divisione develops the theory of logical division: how to divide a genus into species, how to divide a whole into parts, how to divide accidents from substances.","n":[]},{"t":"The work is brief but systematic; it shaped the medieval theory of definition.","n":[]}],[{"t":"De hypotheticis syllogismis is one of the few extant late-antique treatises on hypothetical syllogisms, drawing extensively on Stoic logic.","n":[]},{"t":"The hypothetical syllogism (if A then B; A; therefore B) and its variants (modus ponens, modus tollens, disjunctive syllogisms) had been extensively developed by the Stoics but the texts had largely been lost; my treatment preserves substantial elements of the Stoic system that would otherwise be unrecoverable.","n":[]}],[{"t":"Together these works constitute the original logical contribution; they are not just commentary but systematic treatment of areas where the Greek tradition had not provided a worked-out account.","n":[2,3,4,5]}]],"texts":"De topicis differentiis (On Topical Differences, trans. Stump Cornell 1978/2004) on the theory of topical reasoning; De Divisione (On Division, ed. and trans. Magee 1998) on logical division; De hypotheticis syllogismis (On Hypothetical Syllogisms, ed. Obertello 1969) on hypothetical syllogisms; De Syllogismo Categorico (On the Categorical Syllogism); Introductio ad Syllogismos Categoricos (Introduction to Categorical Syllogisms). Reception: Eleonore Stump's translation and commentary on De topicis differentiis and Boethius's In Ciceronis Topica; John Magee on De Divisione; Christopher Martin on hypothetical syllogisms in late antiquity; Anthony Speca Hypothetical Syllogistic and Stoic Logic (Brill 2001); the medieval theory of topics (Niels Jorgen Green-Pedersen The Tradition of the Topics in the Middle Ages 1984); the medieval reception in twelfth-century logic textbooks.","works":["De topicis differentiis (On Topical Differences, trans. Stump Cornell 1978/2004) on the theory of topical reasoning","De Divisione (On Division, ed. and trans. Magee 1998) on logical division","De hypotheticis syllogismis (On Hypothetical Syllogisms, ed. Obertello 1969) on hypothetical syllogisms","De Syllogismo Categorico (On the Categorical Syllogism)","Introductio ad Syllogismos Categoricos (Introduction to Categorical Syllogisms)"],"reception":"Eleonore Stump's translation and commentary on De topicis differentiis and Boethius's In Ciceronis Topica; John Magee on De Divisione; Christopher Martin on hypothetical syllogisms in late antiquity; Anthony Speca Hypothetical Syllogistic and Stoic Logic (Brill 2001); the medieval theory of topics (Niels Jorgen Green-Pedersen The Tradition of the Topics in the Middle Ages 1984); the medieval reception in twelfth-century logic textbooks.","status":"The original logical works were the basis of much medieval logic. De topicis differentiis was the standard medieval treatment of topics; the medieval theory of topics (Green-Pedersen 1984) is essentially the development of Boethius's framework. De Divisione shaped the theory of definition. De hypotheticis syllogismis was the standard treatment of hypothetical reasoning until the recovery of Aristotle's Prior Analytics in the twelfth century. Stump's translation work and Magee's editorial work exemplify the contemporary scholarly engagement; Speca's Hypothetical Syllogistic and Stoic Logic (2001) develops the relationship to Stoic sources. The works are still read primarily by specialists in medieval logic but their philosophical content remains substantive.","era":"477-524","discipline":"Philosophy, Theology","refs":[{"n":1,"work":"De topicis differentiis","page":"pp. 76–77","canonical":"","quote":"Cicero's Topic *from differentia* can be understood either as the Topic *from the whole* in Themistius's division or as the Topic *from a part;* /1203C/ *from the whole* if the differentia from which the argument is taken is constitutive, and *from a part* if it is divisive. *D ia g ra m I.* (referred to in 1202B, as given in *PL* text) Themistius's Division *In trin sic* *E x trin sic* *I n t e r m e d ia t e* 1.","label":"De topicis differentiis, pp. 76–77"},{"n":2,"work":"De topicis differentiis","page":"pp. 99–100","canonical":"","quote":"When applied in the area of actions, the basic idea of ease becomes skill or proficiency; in the area of material things, it becomes wealth or abun dance. The closest English word in range of meaning is 'competence,' I think; I have also translated the word as 'capability' and 'discipline' in some passages. 6.","label":"De topicis differentiis, pp. 99–100"},{"n":3,"work":"De topicis differentiis","page":"pp. 196–197","canonical":"","quote":"Hence, Differentiae must function to find arguments by aiding in the dis- 43. *De top. liiff.* 1184D7-14; *ICT* 279.2-6 *(PL* 1050B9-13).","label":"De topicis differentiis, pp. 196–197"},{"n":4,"work":"De topicis differentiis","page":"pp. 100–101","canonical":"","quote":"But not all Topics are equally well suited to discover all kinds of syllogisms. Boethius divides syllogisms in two ways: first, some are demonstrative and others dialectical; second, some are predica tive and other conditional. In 1195A13-1196A3, Boethius explains briefly which Topics are suited for which kinds of syllogism. 11.","label":"De topicis differentiis, pp. 100–101"},{"n":5,"work":"De topicis differentiis","page":"p. 123","canonical":"1023b26","quote":"Notes to Book II / *121* 79. 1189B8 (52.36); \"whole.\" Reading *totum* for *notum.* The Basel 1570 edition (p. 867), the Paris 1537 edition (p. 31), and the Orleans ms. (p. 68) all read *totum.* 80. 1189B12 (53.1); \"moved.\"2 Again, different kinds of parts seem at issue here and in the preceding example.","label":"De topicis differentiis, 1023b26"}],"answer":null,"siblings":[{"slug":"divine-prescience-contingency-and-eternity","label":"Divine prescience, contingency, and eternity: how can God's foreknowledge be compatible with human freedom?"},{"slug":"the-consolation-s-argument","label":"The Consolation's argument: from Fortuna to the highest good — is true happiness participation in God rather than the fortune-given goods we naturally pursue?"},{"slug":"the-opuscula-sacra","label":"The Opuscula Sacra: applying logical analysis to theology — does Aristotelian categorical analysis clarify Trinitarian and Christological problems?"},{"slug":"the-logical-translations-and-commentaries","label":"The logical translations and commentaries: does the translatio project + the universals problem in the Porphyry commentaries shape the entire medieval Latin philosophical tradition?"}]}