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Logica, or Summa Lamberti
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15 April 2015

The thirteenth-century logician Lambert of Auxerre was well known for his Summa Lamberti, or simply Logica, written in the mid-1250s, which became an authoritative textbook on logic in the Western tradition. Our knowledge of medieval logic comes in great part from Lambert's Logica and three other texts: William of Sherwood's Introductiones in logicam, Peter of Spain's Tractatus, and Roger Bacon's Summulae dialectics. Of the four, Lambert's work is the best example of question-summas that proceed principally by asking and answering questions on the subject matter. Thomas S. Maloney's translation of Logica, the only complete translation of this work in any language, is a milestone in the study of medieval logic.
More than simply a translation, Maloney's project is a critical, comprehensive study of Lambert's logic situated in the context of his contemporaries and predecessors. As such, it offers a wealth of annotation and commentary. The lengthy introduction and extensive notes to the text explain the origin, theoretical context, and intricacies of the text and its doctrines. Maloney also addresses the disputed issues of authorship, date, and place of publication of the Summa Lamberti and makes available to the English-only audience the French, German, and Italian secondary sources—all translated—that are needed to enter the discussion.
“Thomas Maloney offers us a critical translation of a mid-thirteenth-century logic text, Logica, or Summa Lamberti, written by Lambert of Auxerre. The translation is replete with notes and includes an extensive bibliography of primary and secondary sources. Prominent histories of western philosophy make scant reference, if any, to Lambert of Auzerre and his Logica . . . so Maloney’s fresh translation and critical introduction may be found relevant to subsequent research in the history of medieval philosophy of logic.” —Comitatus
"This translation of the Summa (or Logica) of Lambert, commonly said to be from Auxerre, is a useful addition to current translations of medieval texts, in particular logical ones. Thomas S. Maloney, the translator, also has written extensive notes and a long introduction. The translation is reliable, with some caveats noted below. The book is very well produced, with a good bibliography." —Notre Dame Philosophical Reviews
"With this well-crafted translation with a first-rate introduction and notes on Lambert of Auxerre’s Logica, Thomas S. Maloney has again established himself as a very able translator and commentator on thirteenth-century logic. Now many scholars will be able to study Lambert, Roger Bacon, and Peter of Spain in the context of the period 1240–1260. This new and excellent translation will be a great help to all who study medieval philosophy. The introduction contains a comprehensive account of the identity of Lambert of Auxerre." —Jeremiah Hackett, University of South Carolina
"This is an invaluable addition to the growing library of medieval logic sources available in English. Thomas S. Maloney’s translation is highly readable. His comprehensive overview of the state of research on Lambert’s life and work will be a reference-point for future scholars working on thirteenth-century Latin logic." —Paul Thom, University of Sydney
"Thomas S. Maloney fully commands the primary and secondary sources necessary to elucidate Lambert's Logica. An expert on Roger Bacon's philosophy, he demonstrates a rare proficiency in medieval Latin and Scholastic logic. His references to sources from the ancient (Aristotle and Boethius) and medieval worlds are apposite, perspicuous, and useful. The volume's presentation with an appropriate introduction and commentary in the endnotes will no doubt establish it as an indispensable resource for scholars in the twenty-first century." —Alan Perreiah, University of Kentucky
Thomas S. Maloney is professor of philosophy at the University of Louisville. He is the editor and translator of a number of books, including On Signs by Roger Bacon.
Lambert of Auxerre was a medieval 13th century logician best known for writing the book "Summa Lamberti" or simply "Logica" in the mid 1250s which became an authoritative textbook on logic in the Western tradition. He was a Dominican in the Dominican house at Auxerre. His contemporaries were Peter of Spain, William of Sherwood, and Roger Bacon.
Acknowledgments
List of Abbreviations
Introduction
TRANSLATION OF LOGICA, OR SUMMA LAMBERTI
Chapter One. PROPOSITIONS
Preliminary Remarks
Sound
Words
Names
Verbs
Expressions
Propositions
Categorical Propositions
Hypothetical Propositions
Categorical Propositions, continued
Conversion
Equipollency
Modal Propositions
Chapter Two. PREDICABLES
Genus
Species
Differentiae
Proprium
Accident
Chapter Three. CATEGORIES
Preliminary Remarks
Substance
Quantity
Relation
Quality
Action
Passion
When
Where
Position
Possession
Chapter Four. REMARKS AFTER THE CATEGORIES
Comment on the Chapter Title
Four Kinds of Opposition
Priority
Concomitance
Change
Possession
Chapter Five. SYLLOGISM
Argument and Argumentation
Four Species of Argumentation
Syllogism in Detail
Material and Formal Principles of Syllogisms
Perfect and Imperfect Syllogisms
To-Be-Said-of-All and To-Be-Said-of-None
Quality and Quantity of Syllogisms
Figures of a Syllogism
Chapter Six. TOPICS
Definition of ‘Topic’
Maxims and Differentiae of Maxims
Intrinsic, Extrinsic, and Intermediate Topics
Intrinsic Topics from Substance
The Topic from Definition
The Topic from Description
The Topic from the Explanation of a Name
Intrinsic Topics from Concomitants of Substance
The Topic from a Whole
The Topic from a Part
Additional Topics from a Whole
The Topics from Cause and Effect
The Topics from Generation and What Is Generated
The Topics from Destruction and What Is Destroyed
The Topic from Uses
The Topic from Associated Accidents
Extrinsic Topics
The Topic from Authority
The Topics from a Greater and a Lesser
The Topic from a Similar
The Topic from Proportion
The Topic from Opposites
The Topic from Disparates
The Topic from Transumption
Intermediate Topics
The Topic from Conjugates
The Topic from Cases
The Topic from Division
Chapter Seven. SOPHISTICAL TOPICS
Dialectical and Sophistical Syllogisms
Dialectical and Sophistical Disputations
Goals of Disputation
Fallacies
Preliminary Remarks
The Fallacy of Equivocation
The Fallacy of Amphiboly
The Fallacies of Composition and Division
The Fallacy of Composition
The Fallacy of Division
The Fallacy of Accent
The Fallacy of the Figure of a Word
The Fallacy of Accident
The Fallacy of In a Certain Respect and Absolutely
The Fallacy of Ignorance Regarding Refutation
The Fallacy of Begging the Original Issue
The Fallacy of Consequent
The Fallacy of Treating What Is Not a Cause as a Cause
The Fallacy of Treating More than One Question as One
Chapter Eight. PROPERTIES OF TERMS
Signification
Supposition
Copulation
Kinds of Suppositions
Appellation
Ampliation
Distribution
Relation
Appendix A. Corrections to Latin Text
Appendix B. Questions and Objections
Appendix C. Correlations between Paragraph Numbers in Translation and Page
Numbers in Alessio’s and de Libera’s Editions
Notes
Bibliography
Index of Names
General Index