Preface
Acknowledgments
Part I: From a Positive Existentialism to a Radical Empiricism
1. The Backgrounds of and Initial Efforts Toward a Pure Conception of Possibility
The Influence of Antonio Aliotta's Experimentalism • First Publication: Against the Mythical Conception of Reason • Abbagnano's Concern with Science and with the History of Philosophy
2. Abbagnano's Systematic Thought: The Four Phases
Antirationalism • The Search for the Principle of Metaphysics • The Call for a Positive Existentialism • Developing a Positive Existentialism • The Three Requirements for a Positive Existentialism
3. The Program of a Positive Existentialism
Toward a Radical Empiricism • Parallels with Some More Recent American Philosophy • Dumping Philosophy and the Madness of It That Is Also Folly • Philosophy and Foundationalism • Convergence and Divergence • Marginal Comments on Derrida • Prospects and Conclusions
Part II: Sources for the Concept of Possibility
4. Plato
Defining Existence in the Sophist • Arguments Connected with the Definition of Existence in the Sophist • Abbagnano’s Interpretation of the Definition of Existence in the Sophist • Questions About Abbagnano’s Interpretation
5. Aristotle
Abbagnano’s Position on Greek Metaphysics • Aristotle’s Arguments for the Priority of Actuality over Possibility • Aristotle and the Master Argument of Diodorus Cronus
6. Kant
Kant’s Precritical Notion of Possibility • The Notion of Possibility in the Critique of Pure Reason • The Notion of Possibility in the Critique of Judgment
7. Kierkegaard
Rejecting the Notion of Possibility from the Concluding Unscientific Postscript • Accepting the Notion of Possibility from the Philosophical Fragments • An Incompatibility in Kierkegaard’s Sense of Possibility
Part III: Possibility and Existence
8. The Different Senses of Possibility
A Nominal Definition of Possibility • The Connective in the Nominal Definition • Three Conceptual Definitions of Possibility
9. The First Definition: Possibility as Noncontradiction
Variations of the First Definition • The Characteristics of the First Definition • Difficulties of the First Definition
10. The Second Definition: Possibility as Necessary Realization
Variations and Characteristics of the Second Definition • Some Consequences of the Second Definition • Some Objections to Hartmann’s Formulation • A Distinction Between Possibility and Contingency
11. The Third and Proper Sense of Possibility
Formulating the Third Sense • The Logical Behavior of the Third Sense • The Relation of the Third Sense to Existence • Differences Between Possibility Proper and Actuality • Possibility Proper and the Ontological Predicate (the “Is” of Existence) • The Specter of Circularity • Considerations on the Ontological Predicate
12. Various Senses and Theories of Being
The Article "Essere" • The Predicative Use of To Be • Some Critical Comments • The Existential Use of To Be
13. Some Concluding Critical Reflections
A Doubt About Abbagnano's Antimetaphysic • The Truth or Consequences of an Ontology of Possibility • The Difficulty of Connecting Existence and Possibility • The Question of Necessity • Possibility Without Necessity Is Meaningless
Postscript
Notes
Bibliography
Index of Names