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Apparent Objects: Essays on the Identity and Existence of Manifest Entities
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Philosophy, Theoreretical Philosophy.ORCID iD: 0000-0002-8006-9221
2025 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This dissertation investigates questions of ontology, i.e. questions about what exists, focusing primarily on the existence (and identity) of ordinary objects like tables, chairs, and mountains, but also, at times, objects, such as e.g., abstracta and persons. The overarching theme is whether and how the “manifest” objects we encounter in everyday experience fit into a world best described by fundamental physics and its sparse ontology of particles, waves and void. 

In paper one I critique "easy realism," the view that ordinary ontological claims can be trivially settled in favor of realism through empirical and linguistic inquiry alone (with no need for metaphysics). I argue that easy realism fails because it underestimate the extent to which ordinary language use is predicated on (defeasible) folk-metaphysical beliefs. 

Paper two targets a related view which I call “quasi-eliminativism.” This view says that ordinary object-talk can be true even if ordinary objects are not part of reality’s true ontology. I challenge some key metasemantical assumptions of this view, and argue that it fails given a typically sparse, eliminativist physics-ontology.

In paper three I discuss grounding-based "easy ontology," according to which nonfundamental entities can be posited without adding theoretical cost provided they are metaphysically grounded in fundamental entities. I argue that this approach succeeds only if the fundamental base assumes full metaphysical responsibility for the grounded entities, and that this requires postulating metaphysical laws/principles which end up inflating the fundamental, cost-bearing domain instead. 

Paper four offers a more constructive contribution. Here I present a novel theory of the indeterminacy in cases of radical, gradual change (think ship of Theseus-type cases). I propose that the indeterminacy in such cases is genuinely de re, i.e., that it concerns the existence of the objects themselves (as opposed to the standard view that it concerns the application of concepts to objects). 

Finally, paper five, (really an appendix to paper four), offers a rebuttal to Gareth Evans’ influential argument against indeterminate identity. I show that this argument fails because it doesn't account for the effects of indeterminate identities on property distribution and certain issues to do with indeterminate self-referentiality.

 

Place, publisher, year, edition, pages
Uppsala: Department of Philosophy , 2025. , p. 37
Keywords [en]
Realism, ordinary objects, identity, gradual change, grounding, eliminativism, analyticity, semantics, metasemantics, metaphilosophy
National Category
Philosophy
Research subject
Theoretical Philosophy
Identifiers
URN: urn:nbn:se:uu:diva-554638ISBN: 978-91-506-3113-5 (print)OAI: oai:DiVA.org:uu-554638DiVA, id: diva2:1952220
Public defence
2025-06-09, Humanistiska Teatern, Thunbergsvägen 3C, 752 38 Uppsala, Uppsala, 13:15 (English)
Opponent
Supervisors
Available from: 2025-05-19 Created: 2025-04-15 Last updated: 2025-06-03
List of papers
1. Against Easy Realism
Open this publication in new window or tab >>Against Easy Realism
(English)Manuscript (preprint) (Other academic)
Abstract [en]

According to some contemporary philosophers, call them easy realists, traditional ontological question, such as those concerning the existence of composite objects, properties, events, numbers, (etc.) can be fully resolved, in favor of realism, by inquiring into the semantics of ordinary language.

Easy realism builds on the assumption that ordinary talk of the aforementioned kinds of entities is guaranteed to be true because it directly reflects in the meaning of the involved expressions. In this paper, I provide an argument against this last claim. By pointing to changes in speech-patterns across counterfactual situations where speakers’ beliefs vary, I argue that that ordinary talk of the relevant entities do not reflect facts about meaning, but rather widespread metaphysical beliefs. As a result, contra easy realism, inquiry into the semantics of ordinary language does not suffice to show that such talk is true. My focus is on Thomasson’s version of the view, but I also briefly discuss how the argument might generalize to the wider easy-realist school.

Keywords
Analyticity, analytic truth, easy realism, linking premise, semantical rule, metaphysical inquiry, normativism, ordinary language, counterfactual scenario, deflationism, ontological disputes
National Category
Philosophy
Research subject
Philosophy
Identifiers
urn:nbn:se:uu:diva-554634 (URN)
Available from: 2025-04-15 Created: 2025-04-15 Last updated: 2025-04-15
2. Quasi-eliminativism and folk-ontology
Open this publication in new window or tab >>Quasi-eliminativism and folk-ontology
(English)Manuscript (preprint) (Other academic)
Abstract [en]

Some eliminativists about ordinary objects respond to Moorean complaints about contradiction with common sense by arguing that one can combine eliminativism about entities of a kind K with the view that ordinary statements quantifying over/referring to Ks are (often) true. I call such views Quasi-eliminativism. In this paper, I develop a two-tiered critique of such views.

The first tier targets a metasemantic assumption underlying Quasi-eliminativism: that in ordinary language, semantic content is fixed by externalist use-presence correlations, such that talk about e.g., tables is made true by whatever worldly facts happen to systematically correlates with table-talk. While I agree that use-presence correlations generate significant metasemantical pressure, I argue that fit with associated descriptions also play a key role. More specifically, that radical failure to fit associated descriptions precludes content fixation. This opens space for cases where, even if talk about Ks systematically correlates certain worldly facts, those facts may radically fail to match the associated descriptions, meaning that K-talk systematically misfires. Whilst this does not show that Quasi-eliminativism about any particular kind of entities is false, it opens space for a new sort of counter argument based around the presence of radical description errors.

The second tier then develops precisely such an argument. Here I focus on Quasi-eliminativism about ordinary physical objects. I argue that the descriptions we associate with such objects ascribe a kind of “substantiality” to them – a feature which can be analyzed in terms of the properties projected unto the manifest world by innate, core cognitive systems responsible for object cognition. I then argue that, given the sort of sparse, eliminativist physics-metaphysics which Quasi-eliminativists tend to favor, these descriptions are radically incorrect. As a result, and contrary to what Quasi-eliminativists say, ordinary talk about e.g. tables, chairs and mountains systematically misfires given such a metaphysics (or, at best, is rendered indeterminate).

Keywords
Eliminativism, metasemantics, realism, Moore, substantiality, content assignment, ordinary objects.
National Category
Philosophy
Research subject
Philosophy
Identifiers
urn:nbn:se:uu:diva-554635 (URN)
Available from: 2025-04-15 Created: 2025-04-15 Last updated: 2025-04-15
3. Grounding, parsimony and metaphysical responsibility
Open this publication in new window or tab >>Grounding, parsimony and metaphysical responsibility
(English)Manuscript (preprint) (Other academic)
Abstract [en]

Some have argued that liberal ontologies can avoid paying parsimony-costs for non-fundamental entities so long as they are metaphysically grounded in a sparse fundamental ontology. I argue that this is possible only if the grounders carry full metaphysical responsibility for the grounded, by which I mean that the grounded must be fully constituted, explained or otherwise “traceable back” to its grounders. I also argue that grounding, as ordinarily conceived, fails to guarantee full metaphysical responsibility for the grounded in cases of disjunctive grounds (i.e., case where entities have different grounds at different worlds/times/places) and branching grounds (i.e. cases where one entity grounds two non-identical entities that do not stand in any grounding relation to each other). I explore how the orthodox view on grounding might be revised to overcome this issue, but argue that any revision will end up expanding the fundamental domain with facts about general metaphysical principles/laws. I conclude that non-fundamental entities can be made free of theoretical costs only at the expense of taking on added costs at the fundamental domain.

Keywords
Grounding, parsimony, metaphysical explanation, constitution, theoretical costs, nothing over and aboveness
National Category
Philosophy
Research subject
Philosophy
Identifiers
urn:nbn:se:uu:diva-554636 (URN)
Available from: 2025-04-15 Created: 2025-04-15 Last updated: 2025-04-15
4. De re ontological indeterminacy and gradual change
Open this publication in new window or tab >>De re ontological indeterminacy and gradual change
(English)Manuscript (preprint) (Other academic)
Abstract [en]

When an object undergoes sufficiently radical, gradual change, it sometimes appears indeterminate whether the resulting object is numerically identical to the original. Consequently, it seems indeterminate whether the original object still exists. (Think ship of Theseus-style cases.) The “standard” view is to treat such indeterminacy as being de dicto, i.e., as tracing back to the application of referential terms and concepts to post-change objects (which, themselves, determinately exist). In this paper, I develop an alternative account which treats the indeterminacy as being de re, i.e., as tracing back to the existence of the objects themselves.

The key idea of the paper is to analyze statement of the form “it is indeterminate whether A exists” as claims about a past object, and asserting that it is indeterminate whether there is any object now (or in the future) that is identical to it. I demonstrate that this analysis, if construed correctly, dodges traditional criticisms of de re ontological indeterminacy, such as that it is incoherent, leads to issues with truth and reference, and violates the binary nature of existence. In so doing, the paper effectively demystifies the notion or de re ontological indeterminacy, putting it back on the philosophical table. In addition, I also argue that this de re analysis enjoys certain theoretical advantages over traditional de dicto views, including compatibility with leaner ontologies, and more intuitive views about the referential properties of proper names and pronouns, as well as mapping better to the contents expressed in ordinary speech and thought about cases of gradual change.

Keywords
Ontological indeterminacy, de re indeterminacy, de dicto indeterminacy, gradual change, semantic indeterminacy, metaphysical indeterminacy, identity, identity conditions, temporal persistence, endurantism, perdurantism. Evans’ argument, vague objects.
National Category
Philosophy
Research subject
Philosophy
Identifiers
urn:nbn:se:uu:diva-554440 (URN)
Available from: 2025-04-15 Created: 2025-04-15 Last updated: 2025-04-15
5. Evans' argument against indeterminate identity
Open this publication in new window or tab >>Evans' argument against indeterminate identity
(English)Manuscript (preprint) (Other academic)
Abstract [en]

In this paper, I present a response to Gareth Evan’s (in)famous argument against the possibility of indeterminate identity. Evans argues that statements of the form “it is indeterminate whether a = b” lead to contradiction. I argue that, once we’ve taken into account (i) how properties must distribute across indeterminately identical objects, and (ii) how properties that include indeterminately identical objects in their definition behave logically, we see that a crucial step in Evans’ argument is invalid. More specifically, I argue that, once we take these facts into account, we can see that, if it is indeterminate whether a = b, then it is not the case, as Evans’ claims, that b has the property of being indeterminately identical to a. Instead, b only indeterminately has this property, which blocks the derivation of Evans’ contradiction.

Keywords
Evans argument, de re identity, indeterminate identity, identity, supervaluationism, Leibniz’s law, vague objects
National Category
Philosophy
Research subject
Philosophy
Identifiers
urn:nbn:se:uu:diva-554637 (URN)
Available from: 2025-04-15 Created: 2025-04-15 Last updated: 2025-04-15

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