This paper presents a moral argument in support of the view that the mind is a nonphysical object. It is intuitively obvious that we, the bearers of conscious experiences, have an inherent value that is not reducible to the value of our conscious experiences. It remains intuitively obvious that we have inherent value even when we represent ourselves to have no physical bodies whatsoever. Given certain assumptions about morality and moral intuitions, this implies that the bearers of conscious experiences—the (...) objects possessing inherent value—are not physical objects. This moral evidence is corroborated by introspective evidence. (shrink)

In this paper, I inspect the grounds for the mature Spinozist argument for substance monism. The argument is succinctly stated at Ethics Part 1, Proposition 14. The argument appeals to two explicit premises: (1) that there must be a substance with all attributes; (2) that substances cannot share their attributes. In conjunction with a third implicit premise, that a substance cannot not have any attribute whatsoever, Spinoza infers that there can be no more than (...) one substance. I begin the inspection with the analysis of the first premise, which is provided in the form of the four proofs of God’s existence in Ethics Part 1, Proposition 11. While demonstrating how Spinoza adopts a progressive approach, where the fourth proof of God’s existence is more successful and persuasive than the third, which is more successful than the second, etc., I also unpack concepts central to Spinoza’s thinking here, including the concepts of reason (ratio) and power (potesta or potentia). I then analyze the second premise of the Spinozist argument for substance monism, as established by Ethics Part 1, Proposition 4 in conjunction with Ethics Part 1, Proposition 5. I take up and respond to the objection attributed to Leibniz that a substance p can have the attributes x and y and a substance q can have the attributes y and z, and thus that substances can share some attributes while remaining distinct. Throughout the study, my attention is focused on the argumentative procedures Spinoza adopts. This yields a close, internalist reading of the text where Spinoza effectively embraces substance monism. In conclusion to this study, I underscore to the originality of Spinoza’s argument for seventeenth century theories of substance. (shrink)

Spinoza's Argument for Substance Monism: Why There Is Only One Thing interprets and defends Spinoza's God/Nature argument using speculative metaphysics as a method and illustrates the practice and potential of metaphysics at work. These features work together to strengthen Spinoza's argument that only one substantial being exists.

In the early modern period one can find unity of consciousness arguments in the writings of Rene Descartes and G. W. Leibniz, and in the recent literature they have been defended by David Barnett, William Hasker, and Richard Swinburne (among others). Descartes's unity of consciousness argument for dualism is to be found in the sixth of his Meditations on First Philosophy. Descartes claims that his unity of consciousness argument was itself sufficient to establish substance dualism. Swinburne's central (...) line of argument involves deploying a number of puzzle cases. He argues that our intuitions about these cases can be accommodated only by adopting a “further fact” view of the self, according to which the continued existence of a person over time consists in the continued existence of a mental substance, and “it is metaphysically possible that the substance acquires a totally new body, totally new apparent memories, and character”. (shrink)

I critically examine the view that Descartes’s independence conception (IC) of substance plays a crucial role in his “separability argument” for substance dualism. I argue that IC is a poisoned chalice. I do so by considering how an IC-based separability argument fares on two different ways of thinking about principal attributes. On the one hand, if we take principal attributes to be universals, then a separability argument that deploys IC establishes a version of dualism that (...) is unacceptably strong. On the other hand, if we take principal attributes to be tropes, then IC introduces challenges which undermine the argument. This is partly because the assumption of tropes makes it possible to distinguish several versions of substance dualism, versions which differ with respect to their degree of generality. I argue that taking principal attributes to be tropes makes it challenging to establish any of these versions by way of an IC-based separability argument. I conclude the paper by suggesting a way forward for the proponent of the separability argument. (shrink)

I critically examine the view that Descartes’s independence conception of substance plays a crucial role in his “separability argument” for substance dualism. I argue that IC is a poisoned chalice. I do so by considering how an IC-based separability argument fares on two different ways of thinking about principal attributes. On the one hand, if we take principal attributes to be universals, then a separability argument that deploys IC establishes a version of dualism that is (...) unacceptably strong. On the other hand, if we take principal attributes to be tropes, then IC introduces challenges that undermine the argument. This is partly because the assumption of tropes makes it possible to distinguish several versions of substance dualism, versions that differ with respect to their degree of generality. I argue that taking principal attributes to be tropes makes it challenging to establish any of these versions by way of an IC-based separability argument. I conclude the paper by suggesting a way forward for the proponent of the separability argument. (shrink)

The topic of our analysis is the argument for the existence of substances given by Bernard Bolzano in Athanasia, where he essentially employs two ontological categories: substance and adherence. Bolzano considers the real and conditioned Inbegriff of all adherences, which are wirklich and nicht selbst bestehen. He claims that the formed collection is dependent on something external and non-adherential, which therefore is a substance. Bolzano’s argumentation turns out to be structurally similar to his argument for the (...) existence of God from Lehrbuch der Religionswissenschaft, but in each of these reasonings, we find different plausible interpretations of the key concept “Inbegriff”. The latter argumentation refers to the mereological totality of existentially conditioned objects. We propose the explication of the Bolzanian Inbegriff of all adherences using two types of predication: we consider its extension as composed of certain intensional counterparts of adherences. In our approach, we use a fragment of the theory of abstract objects formulated by E. Zalta, describing two different relations between individuals and properties: extensional exemplification and intensional encoding. We put our reconstruction in a wider context of Bolzano’s ontology, formulating the needed axioms with two primitive predicates of second order... is an adherence,... is conditioned by something real as well as the conditionally introduced first order predicate constant \ for Inbegriff of all adherential ideas. Finally, we sketch a model for our theory. (shrink)

This paper consists in a study of Leibniz’s argument for the infinite plurality of substances, versions of which recur throughout his mature corpus. It goes roughly as follows: since every body is actually divided into further bodies, it is therefore not a unity but an infinite aggregate; the reality of an aggregate, however, reduces to the reality of the unities it presupposes; the reality of body, therefore, entails an actual infinity of constituent unities everywhere in it. I argue that (...) this depends on a generalized notion of aggregation, according to which a thing may be an aggregate of its constituents if every one of its actual parts presupposes such constituents, but is not composed from them. One of the premises of this argument is the reality of bodies. If this premise is denied, Leibniz’s argument for the infinitude of substances, and even of their plurality, cannot go through. (shrink)

This paper develops a valid reconstruction in first-order predicate logic of Leibniz’s argument for his complete concept definition of substance in §8 of the Discours de Métaphysique. Following G. Rodriguez-Pereyra, it construes the argument as resting on two substantial premises, the “merely verbal” Aristotelian definition and Leibniz’s concept containment theory of truth, and it understands the resulting “real” definition as saying not that an entity is a substance iff its complete concept contains every predicate of that (...) entity, but iff its complete concept contains every predicate of any subject to which that concept is truly attributable. An account is suggested of why Leibniz criticises the Aristotelian definition as merely nominal and how he takes his own definition to overcome this shortcoming: while on the Aristotelian basis the predication relation could generate endless chains, so that substances as endpoints of predication would be impossible, Leibniz’s definition reveals lowest species as such endpoints, which he therefore identifies with individual substances. Since duplicate lowest species make no sense, the Identity of Indiscernibles for substances follows. The reading suggests a Platonist interpretation according to which substances do not so much have but are individual essences, natures or forms. (shrink)

Among the various approaches to the question of the nature of the mind , Augustine’s philosophical arguments for the existence of an incorporeal and spiritual substance in man and against materialism are here thoroughly examined on their merits as a source of insight for contemporary discussion. This book, originally published in 1986, employs Augustine’s method of introspection, and argues that, as a philosopher, Augustine can teach the modern mind how to detect the reality of such a spiritual subject in (...) and through basic human acts and faculties, such as imagination, memory, knowledge, free-will and self-knowledge. It presents a critical dialogue with various materialistic anthropologies directly addressed by Augustine himself, or those which have arisen at later periods, including epiphenomenalism, mind-brain identity theory, Marxism and others. (shrink)

Among the various approaches to the question of the nature of the mind, Augustine’s philosophical arguments for the existence of an incorporeal and spiritual substance in man and against materialism are here thoroughly examined on their merits as a source of insight for contemporary discussion. This book, originally published in 1986, employs Augustine’s method of introspection, and argues that, as a philosopher, Augustine can teach the modern mind how to detect the reality of such a spiritual subject in and (...) through basic human acts and faculties, such as imagination, memory, knowledge, free-will and self-knowledge. It presents a critical dialogue with various materialistic anthropologies directly addressed by Augustine himself, or those which have arisen at later periods, including epiphenomenalism, mind-brain identity theory, Marxism and others. (shrink)

ABSTRACTThe most prominent early modern argument against materialism is to be found in Descartes. Previously I had argued that this argument relies crucially on a robust conception of substance, according to which it has a single principal attribute of which all its other intrinsic qualities are modes. In the present paper I return to this claim. In Section 2, I address a question that is often raised about that conception of substance: its commitment to the idea (...) that a substance has a single such principal attribute. Gonzalo Rodriguez-Pereyra and Daniel Garber have argued that this claim relies on Descartes's identification of substance with attribute. But I argue that it relies on his view that a substance has a single, unitary nature. In Section 3, I examine the role of this conception of substance in arguments found in Malebranche and Leibniz and compare these arguments with Descartes's. (shrink)

The debate on the use of performance-enhancing substances or methods to improve refereeing is underdeveloped in the sport philosophical literature. This contrast with the attention scholars have de...

This is a companion to an earlier essay, "An Argument for Dualism from the Lived Experience of Time," in which I argue that our lived experience of being in space is best accounted for on a substance dualist ontology of the experiencing subject and a 3-dimensionalist account of time. Such an account excludes the metaphysical possibility of 4-dimensionalism as a literal, descriptive account of noumenal time inasmuch as it is incompatible with facts we know with greater certainty than (...) any scientific theory. (shrink)

In a sequel to the author's argument for dualism from the lived experience of time, this paper continues the line of thought initiated by in that study a bit further by considering the implications of our experience of being in space for dualism. I conclude that four-dimensionalism cannot accommodate the facts of our experience of ourselves as being in time - localized in space but not located there after the manner of a material thing. Substance dualism, however, makes (...) perfect sense of all these facts, which helps confirm the natural presumption in favor of that view. REVISED: March 24, 2022 with substantive changes. (shrink)

Since something cannot be conscious without being a conscious subject, a complete physicalist explanation of consciousness must resolve an issue first raised by Thomas Nagel, namely to explain why a particular mass of atoms that comprises my body gives rise to me as conscious subject, rather than someone else.In this essay, I describe a thought-experiment that suggests that physicalism lacks the resources to address Nagel's question and seems to pose a counter-example to any form of non-reductive physicalism relying on the (...) mind-body supervenience thesis, which would include William Hasker's emergent dualism. Since the particular thought-experiment does not pose any problems for classical substance dualism (CSD) and since the problem, as I call it, of explaining subjectivity is the central problem of mind, I conclude that CSD is better supported than any form of non-reductive physicalism. (shrink)

Since something cannot be conscious without being a conscious subject, a complete physicalist explanation of consciousness must resolve an issue first raised by Thomas Nagel, namely to explain why a particular mass of atoms that comprises my body gives rise to me as conscious subject, rather than someone else. In this essay, I describe a thought-experiment that suggests that physicalism lacks the resources to address Nagel's question and seems to pose a counter-example to any form of non-reductive physicalism relying on (...) the mind–body supervenience thesis, which would include William Hasker's emergent dualism. Since the particular thought-experiment does not pose any problems for classical substance dualism and since the problem, as I call it, of explaining subjectivity is the central problem of mind, I conclude that CSD is better supported than any form of non-reductive physicalism. (shrink)

Scholars have rejected Wilfrid Sellars’ argument for an ontology of absolute processes on the grounds that it relies on a dubious and dogmatic appeal to the homogeneity of color. Borrowing from Rosenthal’s recent defense, but ultimate rejection of homogeneity, I defend this claim of on Sellarsian/Kantian transcendental grounds, and reconstruct the remainder of his argument. I argue that Sellars has good reason to suppose that homogeneity is a necessary condition of any possible experience, including indirect experience of theoretical-explanatory (...) posits, and therefore good reason to hold that Reductive Materialism, as he conceives it, is an untenable account of color. The remainder of his argument aims to answer the question of what the metaphysical relation is between the state of an experiencing subject that we take color to be and the colorless microphysical particles that we take to constitute that subject. After rejecting Substance Dualism, Epiphenomenalism, and Wholistic or Emergent Materialism as explanatorily inadequate, Sellars proposes that both color-states and micro-physical particles should be understood as manifestations of an underlying ontology on absolute processes. (shrink)

Substratum theory remains a key competitor in the substance ontology literature. Here I argue that an internal worry for the theory gives rise to an interesting dilemma: Either the substratum theorist should abandon the theory in favor of hylomorphism, or she can keep substratum theory but must add to her ontology a powerful causal agent or agents able to operate outside the laws of nature.

Substratum theory remains a key competitor in the substance ontology literature. Here I argue that an internal worry for the theory gives rise to an interesting dilemma: Either the substratum theorist should abandon the theory in favor of hylomorphism, or she can keep substratum theory but must add to her ontology a powerful causal agent or agents able to operate outside the laws of nature.

I advance a type of conceptualist argument for substance dualism – minimally, the view that we are spiritual substances that have bodies – based on the understandability of what it would be for something to be a spirit, e.g. what it would be for God to be a spirit. After presenting the argument formally, I clarify and defend its various premises with a special focus on what I take to be the most controversial one, namely, if thinking (...) matter is metaphysically possible, it is not the case that we have a distinct positive concept of God's being a divine spirit. (shrink)

The most well-known arguments for the simplicity of the soul - i.e., for the thesis that the subject of psychological states must be an unextended substance -are based upon the logical possibility of disembodiment. Descartes introduced this sort of argument into modern philosophy, and a version of it has been defended recently by Richard Swinburne. Some of the underlying assumptions of both arguments are examined and defended, but a closer look reveals that each depends upon unjustified inferences from (...) the conceivability of a certain state of affairs to the logical possibility of that state of affairs. (shrink)

There has in recent years been a significant surge of interest in non-materialist accounts of the mind. Property dualists hold that all substances (concrete particulars that persist over time) are material, but mental properties are distinct from physical properties. Substance dualists maintain that the mind or person is a non-material substance. This article considers the prospects for substance dualism given the current state of the debate. The best known type of substance dualism, Cartesian dualism, has traditionally (...) faced a number of objections, but many contemporary philosophers have sought to avoid these by formulating novel versions of the view. I identify three central claims held in common by all forms of substance dualism, consider recent arguments for these claims, and assess how successfully different types of substance dualism respond to the traditional objections. I argue that most contemporary forms of the view still face one or more of three major challenges, from bundle theories of the self, from the recently developed “phenomenal concepts strategy”, and from worries about explanatory simplicity. (shrink)

This paper considers a seventeenth century argument for (substance) dualism propounded by Cambridge Platonist Ralph Cudworth that appeals to the nature of secondary qualities or sensations. I argue that, despite the widespread acceptance of the primary/secondary quality distinction, this argument is relatively unique for its time since seventeenth century arguments for dualism generally appeal, not to sensory qualities, but to thought, language, rationality, and volition. Indeed, for many, sensations are the most embodied of mental phenomena. I draw (...) points of comparison and contrast between this argument, and nineteenth and twentieth century qualia-based arguments for (property) dualism. Finally, although such an argument might reasonably be called a “Lockean argument for substance dualism,” given Locke’s influential popularization of the primary-secondary quality distinction, I argue that it is not, in fact, an argument to which Locke would subscribe. (shrink)

It is often thought that, although Spinoza develops a bold and distinctive conception of God (the unique substance, or Natura Naturans, in which all else inheres and which possesses infinitely many attributes, including extension), the arguments that he offers which purport to prove God’s existence contribute nothing new to natural theology. Rather, he is seen as just another participant in the seventeenth century revival of the ontological argument initiated by Descartes and taken up by Malebranche and Leibniz among (...) others. That this is the case is both puzzling and unfortunate. It is puzzling because although Spinoza does offer an ontological proof for the existence of God, he also offers three other non‐ontological proofs. It is unfortunate because these other non‐ontological proofs are both more convincing and more interesting than his ontological proof. In this paper, I offer reconstructions and assessments of all of Spinoza’s arguments and argue that Spinoza’s metaphysical rationalism and his commitment to something like a Principle of Sufficient Reason are the driving force behind Spinoza’s non‐ontological arguments. (shrink)

Scholastic hylomorphism conceives prime matter and substantial form as metaphysical parts of every physical substance. During the early modern period, both hylomorphic constituents faced significant criticism as scientists and philosophers sought to replace Aristotelianism with physical explanations for the workings of the universe. This paper focuses specifically on prime matter and delves into the arguments put forth by four 16th-century scholastic philosophers – Toledo, Fonseca, Góis, and Suárez – in their attempts to establish the existence of prime matter. Firstly, (...) I analyse a set of arguments rooted in substantial change, which emphasize the crucial role of a persistent, common substrate in the processes of generation and corruption. Secondly, I explore a set of ex-nihilo arguments and, thirdly, I examine a series of demonstrations based on the interplay between accidental and substantial change. Although these three sets of arguments converge on the necessity of a common substrate for substantial change to occur, they fall short of demonstrating that this substrate is both prime and shared by all natural entities. Fourthly, I turn to a set of arguments centred on the impossibility of infinite regress, designed to complement those related to natural change, and I assess additional arguments that do not primarily focus on substantial change. Lastly, I draw my conclusions on these argumentative strategies to demonstrate the existence of prime matter. (shrink)

The modal argument for the existence of a Cartesian human soul proposed by Richard Swinburne more than thirty years ago, if slightly adjusted and interpreted correctly, becomes a plausible argument for anyone who accepts modal arguments. The difficulty consists in a relatively weak justification of the second premise, of the real possibility of a disembodied existence, as a result of which the argument does not provide a real proof. The argument is best understood in the following (...) terms: Special divine action is excluded from the metaphysical possibilities and only the natural possibilities are considered; the “conceivable” possibility of the existence of a person without a body is interpreted as a metaphysical possibility, and inductive support for its reality is provided by apparent first-person-conceivability of a disembodied existence, detailed descriptions of out-of-body and near-death experiences, a priori trust in introspection in psychology and the cognitive sciences, and by the unity of consciousness and the possibility of its extension to peripersonal space; statements about having a soul or being a material substance are excluded from the domain of the premises; and finally, one accepts the Kripkean principle that having a body or a soul is an essential component of a person. If these conditions are met, the argument is valid, and the conclusion is made more plausible by Swinburne’s modal argument than it would be without it.Argumentum modale pro animae humanae “Cartesianae” existentia, quod R. Swinburne ante plures quam 30 annos proposuit, acceptabile reddi potest cuicumque argumenta modalia non generatim respuenti, si paululum emendetur recteque intelligatur. Omnis huius argumenti diffi cultas consistit in iustifi catione debiliore secundae eius praemissae, quo pacto argumentum ineffi cax redditur. Argumentum vero optime intelligetur his quattuor punctis animadversis: Primo, possibilitas metaphysica non nisi possibilitates naturales comprehendere intelligatur, omni speciali Dei ingerentia exclusa. Secundo, personae possibilitas “conceptibilis” sine corpore existendi intelligatur ut realis possibilitas metaphysica. Cui realitati argumenta favent inductiva tum ex possibilitate imaginandi existentiam sine corpore; tum ex minutatim enarratis testimoniis experiendi status “extra corpus” et “prope mortem”; tum ex fi de fundamentali veritatis introspectionis in psychologia scientiis que cognitivis; tum ex unitate conscientiae ac possibilitate eam in spatium extra corpus extendendi. Tertio, e praemissarum congerie assertiones excludantur quibus homo animam habere vel substantiam materialem esse assumeretur. Quarto, principium S. Kripkii accipiatur, scil. corporis vel animae habitum personae essentialem esse debere. His omnibus servatis argumentum Swinburnii validum evadit, conclusionem suam plus credibilem reddens quam secus esset. (shrink)

In this paper, I will reconstruct Hume's argument for the ontological (in the sense of rigid existential) independence of simple properties in A Treatise of Human Nature , Book 1 (1739). According to my reconstruction, the main premises of the argument are the real distinctness of every perception of a simple property, Hume's Separability Principle and his Conceivability Principle. In my view, Hume grounds the real distinctness of every perception of a simple property in his atomistic theory of (...) sense perception and his Copy Principle. I will also show why Hume's argument should be seen as relevant nowadays. David Lewis and his followers in metaphysics continue Hume's line of thinking in this respect, which is opposed by power ontologists (Brian Ellis, Stephen Mumford), for example. (shrink)

Averroes held the controversial thesis that there is only one separate material or possible intellect for all humans. This paper analyzes a passage from his Long Commentary on the De Anima which has been thought to constitute a primary philosophical argument for the view. It is called the Determinate Particular Argument, because it contends that the material intellect cannot be a determinate particular if it is to be the ontological receptacle of universal intelligible forms. After defending one crucial (...) premise, it will be shown how the key term “determinate particular” must be qualified to avoid an inconsistency with Averroes’s metaphysics and his position on the species membership of separate substances. Given this qualification in the face of competing views, the paper concludes that the Determinate Particular Argument should not be taken as a sufficient and independent argument for Averroes’s full thesis on the intellect. (shrink)

Within the substance ontology literature in recent analytic metaphysics, four principal theories are in competition: substratum theory, bundle theory, primitive substance theory, and hylomorphism. This paper is part of a larger project attempting to show that each of these four theories is incompatible with metaphysical naturalism. To that end, I explicate and defend the following argument: Premise 1: Prime matter either can exist on its own or it cannot. Premise 2: If prime matter can exist on its (...) own then metaphysical naturalism is false. Premise 3: If prime matter cannot exist on its own then metaphysical naturalism is false. Conclusion: Therefore, either way, metaphysical naturalism is false. (shrink)

Approximately 1500 years ago John Philoponus proposed a simple and compelling argument for the existence of God: (1) Whatever comes to be has a cause of its coming to be; (2) The universe came to be; (3) Therefore, the universe has a cause of its coming to be. Due to the influence of William Lane Craig — analytic philosopher, Christian apologist, champion of Philoponus’s position, and author of The Kalam Cosmological Argument — this argument and the family (...) of subarguments that support it have come to be known as the Kalam Cosmological Argument (KCA). The term kalam comes from Medieval Arabic philosophy and broadly means "natural theology" or "philosophical theism." Despite being one of the most widely discussed and hotly debated arguments in philosophy today, it has been more than twenty-five years since any systematic presentation of the argument as a whole has been attempted. The present book helps remedy that situation, laying bare the logical structure of the KCA as it has emerged from continuous philosophical refinement. A handy taxonomy of major objections and replies to the KCA has been included as an aid to understanding the argument and its background literature. This book breaks new ground by arguing that future progress on the KCA requires that the argument be situated within a substance-based metaphysics. In addition to providing an analytic account of substances, this book describes a modal theory sensitive to the possibilities and necessities that obtain for substances. With these conceptual tools, the characteristic thought-experiments supporting the KCA can be properly assessed. (shrink)

In this article I subject to criticism Field's argument, according to which field theory takes space-time to be substance since it ascribes field properties to space-time points. There is petitio principii error made in this reasoning because Field does not give any justification for his controversial assumption that fields are properties of space-time points. What is more, I suggest, Field's interpretation of field theory is incompatible with the way this theory is understood and utilized by its users, namely (...) scientists. My criticism is based on the assumption that one cannot propose an ontology of a given scientific theory, at the same time imposing on it an interpretation which clashes with the interpretation current among its users. I also suggest that in order to establish the ontology of a scientific theory one should also take into account the way it has been constructed. According to this criterion, field theory does indeed take space-time to be a substance. (shrink)

Approximately 1500 years ago John Philoponus proposed a simple and compelling argument for the existence of God: (1) Whatever comes to be has a cause of its coming to be; (2) The universe came to be; (3) Therefore, the universe has a cause of its coming to be. Due to the influence of William Lane Craig — analytic philosopher, Christian apologist, champion of Philoponus’s position, and author of The Kalam Cosmological Argument — this argument and the family (...) of subarguments that support it have come to be known as the Kalam Cosmological Argument (KCA). The term kalam comes from Medieval Arabic philosophy and broadly means "natural theology" or "philosophical theism." Despite being one of the most widely discussed and hotly debated arguments in philosophy today, it has been more than twenty-five years since any systematic presentation of the argument as a whole has been attempted. The present book helps remedy that situation, laying bare the logical structure of the KCA as it has emerged from continuous philosophical refinement. A handy taxonomy of major objections and replies to the KCA has been included as an aid to understanding the argument and its background literature. This book breaks new ground by arguing that future progress on the KCA requires that the argument be situated within a substance-based metaphysics. In addition to providing an analytic account of substances, this book describes a modal theory sensitive to the possibilities and necessities that obtain for substances. With these conceptual tools, the characteristic thought-experiments supporting the KCA can be properly assessed. (shrink)

Most critics of Richard Swinburne’s modal argument for mind-body substance dualism have alleged that the argument is unsound, either because its premises are false or because it commits a modal fallacy. I show that the argument is epistemically circular, and thus provides no support for its conclusion even if it is sound.

The third Meditation is typically understood to contain two a posteriori arguments for the existence of God. The author focuses on the second argument, where Descartes proves the existence of God partly in virtue of proving that Descartes cannot be the cause of himself. To establish this, Descartes argues that if he were the cause of himself, then he would endow himself with any conceivable perfection. The justification for this claim is that bringing about a substance is more (...) difficult than creating an attribute, so anything that can do the former can do the latter. While current explanations of this justification are either implausible or inadequate, the author argues that this principle derives support from a scholastic distinction between being-as-such and determinate being. With this distinction in view, we can make sense of Descartes's argument without appealing to ambiguous or inadequate notions. (shrink)

Bonaventure’s Sentence Commentary provides the most comprehensive set of trinitarian arguments to date. This article focuses on just one of them, the one from beatitude. Roughly, beatitude can be thought of as God’s enjoyment of his own, supreme goodness. After a brief rationale of Bonaventure’s speculative project, I assay the concept of beatitude and exposit his four-stage argument. Bonaventure reasons: (i) for a single supreme substance; (ii) for at least two divine persons; (iii) against the possibility for an (...) infinite number of divine persons; (iv) for at least three, and against the possibility of four (or more) divine persons. I show how this line of reasoning is significantly more complex than Bonaventure’s terse summaries initially indicate. My main goal is to explicate the four steps and unpack their main support. Along the way I attend to the argument’s sources, logical progression, and I respond to several concerns. (shrink)

Let us say that an extended object is “composed wholly of simples” just in case it is an aggregate of absolutely unextended parts spread throughout an extended region—that is, just in case there is a set S such that: every member is a point-sized part of the object, and for every x, x is part of the object if and only if it has a part in common with some member of S. Could a truly extended substance be composed (...) entirely of unextended parts? Reflection upon the fact that it must be at least possible for extended objects to touch one another suggests that the answer to this question is: No. (shrink)