'...one of the most interesting contributions to the history of logic available today, boasting a rare combination of solid scholarship and sharp logical understanding.' Journal of the History of Philosophy '...a highly original work of major importance not only in formal logic but also in general philosophy ... Dr. Barth's work is based on an impressively sensitive command of a vast array of ancient, medieval, Renaissance, and more recent formal logic, down to the present day, and has a range of implications far beyond what can be explained in a brief review. ... the mastery so brilliantly in evidence in Dr. Barth's work is still rare elsewhere - a fact shich makes her work all the more welcome.' The Modern Schoolman '...profound and of an enormous intellectual richness... extremely rich as to analysis, critical linguistics, that clarifies the logical foundations of philosophy. The author demonstrates great knowledge of logic, of philosophy, and of the history of both, ...this is a work of capital importance due to its content as well as to the method it follows, thus drawing large horizons for future research.' Estudios Filosoficos (Spain)

• 1. The Problem.- I. Introduction: Problems and Sources.- II. Naming What is.- III. The Semantics of the Logical Constants.- 2. Historical Survey.- IV. From the History of the Logic of Indefinite Propositions.- V. From the History of the Logic of Individual Propositions.- VI. Singular - General - Indefinite.- VII. The Identity Theories of the Copula.- 3. Descent.- VIII. Argument by Analogy.- IX. The Problem of the Logic of Relations and its Connection with the Logic of the Articles.- 4. Ascent.- X. Introduction of Indefinite Propositions by Ekthesis.- XI. Conjunction, Potentiality, and Disjunction.- XII. Summary and Conclusion.- Index of Proper Names.- Index of Subjects.

'...one of the most interesting contributions to the history of logic available today, boasting a rare combination of solid scholarship and sharp logical understanding.' Journal of the History of Philosophy '...a highly original work of major importance not only in formal logic but also in general philosophy ... Dr. Barth's work is based on an impressively sensitive command of a vast array of ancient, medieval, Renaissance, and more recent formal logic, down to the present day, and has a range of implications far beyond what can be explained in a brief review. ... the mastery so brilliantly in evidence in Dr. Barth's work is still rare elsewhere - a fact shich makes her work all the more welcome.' The Modern Schoolman '...profound and of an enormous intellectual richness... extremely rich as to analysis, critical linguistics, that clarifies the logical foundations of philosophy. The author demonstrates great knowledge of logic, of philosophy, and of the history of both, ...this is a work of capital importance due to its content as well as to the method it follows, thus drawing large horizons for future research.' Estudios Filosoficos (Spain)

• 1. The Problem.- I. Introduction: Problems and Sources.- II. Naming What is.- III. The Semantics of the Logical Constants.- 2. Historical Survey.- IV. From the History of the Logic of Indefinite Propositions.- V. From the History of the Logic of Individual Propositions.- VI. Singular - General - Indefinite.- VII. The Identity Theories of the Copula.- 3. Descent.- VIII. Argument by Analogy.- IX. The Problem of the Logic of Relations and its Connection with the Logic of the Articles.- 4. Ascent.- X. Introduction of Indefinite Propositions by Ekthesis.- XI. Conjunction, Potentiality, and Disjunction.- XII. Summary and Conclusion.- Index of Proper Names.- Index of Subjects.

'...one of the most interesting contributions to the history of logic available today, boasting a rare combination of solid scholarship and sharp logical understanding.' Journal of the History of Philosophy '...a highly original work of major importance not only in formal logic but also in general philosophy ... Dr. Barth's work is based on an impressively sensitive command of a vast array of ancient, medieval, Renaissance, and more recent formal logic, down to the present day, and has a range of implications far beyond what can be explained in a brief review. ... the mastery so brilliantly in evidence in Dr. Barth's work is still rare elsewhere - a fact shich makes her work all the more welcome.' The Modern Schoolman '...profound and of an enormous intellectual richness... extremely rich as to analysis, critical linguistics, that clarifies the logical foundations of philosophy. The author demonstrates great knowledge of logic, of philosophy, and of the history of both, ...this is a work of capital importance due to its content as well as to the method it follows, thus drawing large horizons for future research.' Estudios Filosoficos (Spain)

• 1. The Problem.- I. Introduction: Problems and Sources.- II. Naming What is.- III. The Semantics of the Logical Constants.- 2. Historical Survey.- IV. From the History of the Logic of Indefinite Propositions.- V. From the History of the Logic of Individual Propositions.- VI. Singular - General - Indefinite.- VII. The Identity Theories of the Copula.- 3. Descent.- VIII. Argument by Analogy.- IX. The Problem of the Logic of Relations and its Connection with the Logic of the Articles.- 4. Ascent.- X. Introduction of Indefinite Propositions by Ekthesis.- XI. Conjunction, Potentiality, and Disjunction.- XII. Summary and Conclusion.- Index of Proper Names.- Index of Subjects.