ABSTRACT Explanation in Metaphysics Daniel M. Johnson, Ph
Total Page:16
File Type:pdf, Size:1020Kb
ABSTRACT Explanation in Metaphysics Daniel M. Johnson, Ph.D. Mentor: Alexander R. Pruss, Ph.D. One of the primary tasks of the philosopher is to explain what it is for something to be the case—what it is for one event (substance, fact) to cause another, what it is for an action to be obligatory, what it is for an object to bear a property, what it is for a proposition to be true necessarily, what it is for a person to know something. This activity of explaining what something is or what it is for something to be the case, of identifying what I call ontological explanations, is of special importance to metaphysics, since the task of metaphysics generally is to get to the bottom of reality. The concept of ontological explanation is usually buried a layer deep in most discussions, however, and theses about it are either presupposed or clothed as claims about other things. In some cases, this leads to confusion and frustration, and in many other cases the discussion could benefit from a long look at ontological explanation even if that look isn’t strictly necessary to remedy confusion. My goal is to give ontological explanation that long look, and then use the clarity gained to reinterpret, reorganize, and even make progress on some long-standing disputes in metaphysics. In the first two chapters I examine ontological explanation itself and connect it to a host of important metaphysical issues, including ontological commitment and truthmaker theory. In the third and fourth chapters, I apply the work done in the first two chapters to a pair of important metaphysical arguments that crucially employ infinite regresses of ontological explanations—Bradley’s Regress and McTaggart’s Paradox. Explanation In Metaphysics by Daniel M. Johnson, B.A., M.A. A Dissertation Approved by the Department of Philosophy ___________________________________ Michael D. Beaty, Ph.D., Chairperson Submitted to the Graduate Faculty of Baylor University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Approved by the Dissertation Committee ___________________________________ Alexander R. Pruss, Ph.D., Chairperson ___________________________________ Jonathan L. Kvanvig, Ph.D. ___________________________________ J. Todd Buras, Ph.D. ___________________________________ Robert C. Roberts, Ph.D. ___________________________________ Klaus Kirsten, Ph.D. ___________________________________ Robert C. Koons, Ph.D. Accepted by the Graduate School ___________________________________ J. Larry Lyon, Ph.D., Dean Page bearing signatures is kept on file in the Graduate School. Copyright © 2011 by Daniel M. Johnson All rights reserved TABLE OF CONTENTS Acknowledgments vi Dedication vii CHAPTER ONE: Ontological Explanation and Ontological Commitment 1 1. Introduction 1 1.1 General Introduction 1 1.2 Chapter Introduction 3 2. The Nature of Ontological Explanation 5 2.1 Identifying Ontological Explanation 5 2.2 Features of Ontological Explanation 8 2.3 Related Concepts 18 3. Ontological Commitment 26 3.1 Introduction 26 3.2 A Modified Quinean Quantifier View 30 3.3 A Modified Truthmaker View 45 3.4 Objections and Alternative Approaches 65 3.5 A More General Defense 70 4. The Anti-Theory of Roberts and Wood 72 CHAPTER TWO: Constraints on and Demands for Ontological Explanation 84 1. Introduction 84 2. The Constraint: Infinite Regresses 87 iii 2.1 Introduction: Cameron‘s Challenge 87 2.2 The Argument from Explanatory Failure 89 2.3 Resisting the Argument from Explanatory Failure 101 2.4 Arguments from Ontology and Circularity 106 3. The First and Second Demands: The Principle of Sufficient Reason and Ockham‘s Razor 114 3.1 The Principle of Sufficient Reason 114 3.2 Ockham‘s Razor 118 4. The Third Demand: Truthmaker Theses 120 4.1 Truthmaker Theses and Demands for Ontological Explanation 120 4.2 Defending a Truthmaker Thesis 126 CHAPTER THREE: Explaining Properties: Bradley‘s Regress 138 1. Introduction 138 2. Understanding the Regress 140 2.1 The Nature of the Regress 140 2.2 The Viciousness of the Regress 156 3. Starting and Stopping the Regress: Realist Theories 159 3.1 Substratum Theory 161 3.2 Bundle Theory 167 3.3 Loux‘s Neo-Aristotelian Natural Kind Theory 173 3.4 States of Affairs and Trope Theory 179 iv CHAPTER FOUR: Explaining Time and Change: McTaggart‘s Paradox 183 1. Introduction 183 1.1 Chapter Introduction 183 1.2 McTaggart‘s Argument 187 1.3 The Viciousness of the Regress 194 2. The First Demand: Time‘s Motion 198 2.1 Introduction 198 2.2 The Williams-Smart Argument from the Metaphor of Motion 200 2.3 The First Solution: Retaining the Metaphor 207 2.4 The Second Solution: Discarding the Metaphor 216 2.5 Critique of Parsons 222 3. The Second Demand: Truthmakers and the Grounding Objection 224 3.1 Introduction 224 3.2 Eternalist A-theory 226 3.3 Presentism 230 4. The Third Demand: Ockham‘s Razor 233 4.1 Introduction 233 4.2 Resisting the Third Demand: The Translation Argument 235 4.3 Resisting the Third Demand: The Phenomenological Argument 248 4.4 Resisting the Third Demand: McTaggart‘s Strategy 250 4.5 Satisfying the Third Demand: Presentism and Ockham‘s Razor 252 4.6 Conclusion 253 Bibliography 254 v ACKNOWLEDGMENTS I would like to thank Rob Koons, Todd Buras, Jonathan Kvanvig, and Robert Roberts for their feedback, help, and encouragement. I would also like to thank Robert Garcia, Adam Pelser, and an audience at the Baylor Graduate Colloquium for helpful conversations regarding parts of the dissertation. Most of all, I would like to thank Alexander Pruss for his remarkable help and encouragement throughout the whole project—his fingerprints are on every part of this dissertation (though of course any errors are mine alone), and it would have been a far worse project without his aid. I would also like to thank my parents for their unstinting support and encouragement, for their unwavering affirmation that a Ph.D in philosophy is a worthy and valuable goal. Finally, I thank my wife for believing in me and supporting me, now and always. vi To my father, who taught me to live the life of the mind vii CHAPTER ONE Ontological Explanation and Ontological Commitment 1. Introduction 1.1 General Introduction One of the primary tasks of the philosopher is to explain what it is for something to be the case—what it is for one event (substance, fact) to cause another, what it is for an action to be obligatory, what it is for an object to bear a property, what it is for a proposition to be true necessarily, what it is for a person to know something—there are nearly as many items on this list is as there are topics in philosophy. This activity of explaining what something is or what it is for something to be the case is of special importance to metaphysics, since the task of metaphysics generally is to get to the bottom of reality. It is a bit ironic, therefore, that metaphysicians have spent so much more of their time investigating concepts related to this kind of explanation—supervenience, emergence, ontological dependence, and so on—than they have investigating explanation itself. As we will see, the involved discussion of scientific and causal explanation in the philosophy of science and the philosophy of religion is peripheral to the sort of explanation relevant here, what I will from here on call ontological explanation. This isn‘t to say that metaphysicians and other philosophers haven‘t said anything relevant to ontological explanation; indeed, they could hardly have avoided doing so, given how intimately bound up with explanation so many of their projects are. Instead, the concept of ontological explanation remains buried a layer deep in most discussions, and theses 1 about it are either presupposed or clothed as claims about other things. In some cases, this leads to confusion and frustration, and in many other cases the discussion could benefit from a long look at ontological explanation even if that look isn‘t strictly necessary to remedy confusion. My goal is to give ontological explanation that long look, and then use the clarity gained to reinterpret, reorganize, and even make progress on some long-standing disputes in metaphysics. The two disputes I have particularly in mind are those over a pair of metaphysical infinite regress arguments, Bradley‘s Regress and McTaggart‘s Paradox. Both have been around for a long time—McTaggart‘s argument for over a century and Bradley‘s for far longer, since it is a version of Plato‘s Third Man argument from the Parmenides—and both remain at the center of peculiarly intractable controversy. It is my contention that the notion of ontological explanation lies buried at the center of the discussion of both arguments. Two consequences follow, which I aim to establish in each case. First, much of the variety of arguments and views surrounding each argument can and should be recast as arguments or views about ontological explanation, either as attempts to motivate (or deny) demands for it, or as restrictions or denials of restrictions on it. Realizing this can help in evaluating these arguments and views, or at least in clarifying exactly what is at stake. Second, this means that the positions it is permissible to take on these particular arguments are constrained by general truths about ontological explanation: its nature, restrictions on it, and general demands for it. Because of this, I need first to zoom out and look at ontological explanation itself. In the first chapter, I‘ll look at the nature of ontological explanation, explore some of its 2 features and its relations to a family of other concepts, and argue that it is important because of its connection to ontological commitment.