Ontology is the study of the nature of being, existence or reality as such, as well as the basic categories of being and their relations.

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What is the ontological status of a story plot?

A stage play, a movie, and a comic book can all have the same plot. And this despite being very different mediums physically, and even if they are set in completely different fictional universes. ...
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What does Kant mean by “Existence is not a predicate”?

What does Kant mean by "Existence is not a predicate"? How does that invalidate the ontological arguments? and how can he show that it's not a predicate? By predicate, I think he means a "property"...
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Is it possible to maintain the truth of levels of 'being' or can't they be true at the same time next to each other?

With levels I mean different 'perspectives' on a subject/happening. For example, all things have color. When we see a green tree we say this tree is green. So from this level the tree is green. But ...
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On a paradox of existence

There is a famous question by Einstein which was reported by his biographer, the physicist Abraham Pais, and which expresses his concern with quantum physics: We often discussed his notions on ...
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Can more than 2 things be in direct opposition?

What I mean by this, is something which is exactly opposite to say both positive and negative, just as much as the two are in opposition to each other. This idea arose and evolved when I was thinking ...
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Can anything be truer than true?

The Wikipedia page of Philosophy of Science says, "This discipline overlaps with metaphysics, ontology, and epistemology, for example, when it explores the relationship between science and truth such ...
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When Heidegger talks about “Being” is it related to the totality of all entities in a unity “Being”?

When Heidegger talks about "Being" is it related to the totality of all entities in a unity "Being"? That is, by analogy, is the Being in Heidegger something like "Para Brahman" (in Hindu Philosophy) ...
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Superposition principle: how additivity, linearity and orthogonality are related? [closed]

Suppose I throw in a blue color into the water. It becomes blue. It then also throw some salt into it, it becomes salty. The color and taste seem to be additive. But they also seem to be orthogonal -- ...
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How can something non-physical exist?

One sees arguments for the existence of non-physical entities such as God, qualia, Plato's forms, objective ethical truths, etc... But what does it mean for something non-physical to exist? It ...
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Derrida's “Strategic Bet”

I was wondering if anyone could help me understand what Derrida's "Strategic Bet” is? (from his “Ends of Man”). And also, how do the alternatives in the bet define deconstruction?
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Are normal numbers evidence true randomness exists?

Is the existence of normal numbers evidence true randomness exists, and in every possible world at that? Another mind blowing fact is that most of real numbers are normal, so the normal numbers is not ...
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According to modal realism, how many possible worlds are there?

Modal realism tells us there is an infinity of possible worlds, but how many are there exactly? Is it countable infinity ℵ₀, uncountable infinity 𝖈, or some other, bigger uncountable infinity?
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Sartre's use of the word “Transcendence” and its meaning

I have been looking into some resources explaining Husserl's idea of transcendence and they point out that Sartre's idea of transcendence is based on Husserl's. Here are the different aspects/ideas of ...
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Something that has an end must have a beginning?

In ancient Hebrew book (http://dafyomireview.com/article.php?docid=398#ch5) dealing with logical proof of creation of the world. The following premise is established PROOF OF SECOND PREMISE - (...
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How does a realist account for causation between universals and particulars?

With respect to universals nominalists maintain that there are no universals and only particulars exists. Conversely, realists says that there are universals. Here is a sketch of an argument against ...
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Can the correspondence theory of truth really be completely avoided?

Let us assume that 'truth' is a construct of the human mind. In this case truth is defined as some product of the mind's 'verification', and nothing else. What 'makes' a statement true is simply the ...
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Is it possible to have faith in science while espousing anti-realism?

Realism is the theory that there is a mind-independent reality which we can know and interact with. Anti-realism holds, in general, either that there is no such mind-independent reality or that if ...
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What distinctions does Quine draw between ontological and ideological commitments?

Quine held in "On What There Is" the following: "A theory is committed to those and only those entities to which the bound variables of the theory must be capable of referring in order that the ...
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Metaphysically, what comes before the cognitive ability to make distinctions?

Descartes, for example, makes the distinction between body and mind by recognizing the body as an idea born from 'extension' and the mind as an idea born from 'consciousness'. He further recognizes '...
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Are there philosophies that call for things which are not mind nor matter?

Physicalism is the idea that everything is matter. Idealism is the idea that everything is made up of a mental substance. Dualism claims that there are both matter and mind in the universe. It ...
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How does 'having an idea of something' differ from 'mental existence'?

Source: pp 38-39, Philosophy: A Complete Introduction (2012) by Prof Sharon Kaye (MA PhD in Philosophy, U. Toronto) Perhaps the problem lies in Anselm's twofold conception of existence. Anselm ...
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Philosophy term for “variation”

Thinking from a fundamental or foundational ontology perspective ... I want to read what philosophers have written about a concept which in my own mind I have been calling "variation". I am thinking ...
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What is Kant's view of a mathematical object?

I wonder what are mathematical objects - say, the number 1, a circle etc. - for Kant? Do they have some kind of special status for him compared to ordinary (empirical) objects? Where exactly he talks ...
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Meaning of Being in 'Being and Nothingness'?

I just started reading Sartre's magnum opus and right on page two he begins to mention that being and appearance dualism is no longer entitled to any "legal status within philosophy". What is the ...
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Question About The Purpose of Life [closed]

I’m not well read on philosophy, but often think about what you could call philosophical issues, such as the purpose of life and what it means to be good etc. I’ve been pondering one idea around the ...
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How can the physical world be an abstract mathematical structure?

This is Tegmark's short formulation of the "mathematical universe" (paraphrased by detractors as "reality made of math"), and he goes out of his way to stress that he means the "is" literally:"Whereas ...
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What's the difference between a philosophical ontology and a computational ontology?

A computational ontology is supposed to be decidable and tractable, how else is it different from a philosophical ontology? Is there a peer-reviewed explanation of the similarities and differences ...
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What would be the difference between property and kind?

Philosopher E.J. Lowe states that There is a clear difference between saying something like ‘Rover is a dog’, in which we assign Rover, a particular animal, to a certain natural kind or species, ...
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Did Kant come to believe that we have access to things-in-themselves after all?

Kant's position on things-in-themselves is often described Socratically, of them we know only one thing, that they are. However, in an old but apparently still popular history of philosophy book I ...
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What actually are meaningless symbols?

Some days ago our professor during the course of his lecture wrote the following definition of a polynomial. We say that an expression of the form a0 + a1x + a2x2 + ... + anxn is a polynomial of ...
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What is the difference between essential and existential ontology?

What are the differences between essential ontology and existential ontology? Does existential Ontology start with Heidegger. Is there any definition of both?
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How is conceptual irreducibility of the mental possible given a physicalist ontology?

In 'Mental Events' Davidson wrote "...mental events are mental only as described". Many have taken this and other of his remarks as showing that he holds that the anomalousness and irreducibility of ...
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Why did pre-Socratic philosophers take on the concept of 'being'?

Why did philosophers (starting from pre-Socratic f.e. Tales) take on the concept of 'being'? I see a chair and ... nothing. I do understand why they started to observe nature but why did they need to ...
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How many angels can dance on the head of a pin?

This question became a symbol for the silly and pointless sophistry of medieval scholastics. But as modern scholarship has shown scholastics was not such a thoughtless desert as some of its ...
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Does a rejection of the principle of sufficient reason result in blurring the distinction between being and non-being?

Celestine Bittle in 'Reality and the Mind' holds that if we do not grant that there is a reason for being rather than non-being, then there is no actual distinction between being and non-being since ...
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How are epistemological and ontological realism related?

The SEP article on idealism begins: ... [this article] examines the relationship between epistemological idealism (the view that the contents of human knowledge are ineluctably determined by ...
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Is there a word for the idea that the world is “a collection of collections”?

I'm looking for a (possibly ontological) recognised term for a theory that acknowledges that things can be broken down into smaller things - essentially components, parts and eventually atoms, quarks ...
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Can the principle of indiscernibility of identicals be restated as “I am what I think”? [closed]

I was reading Leibniz recently and had this epiphany, and thought why not see if any others out there might share a similar intuition. Concerning Leibniz's two principles of identity The ...
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Would truly random events be strictly equivalent to events without a cause?

There are a couple of questions (one, another) about this topic, and as I was thinking about this for a while, I started wondering whether there has been any systematic research into this that raises ...
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Does one have to become a Platonist to refuse to be a Platonist?

I believe the answer is no, but Scott Aaronson on his blog just gave in interesting argument to the contrary. This is in connection with the now famous paper Undecidability of the Spectral Gap, and ...
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Why do modern materialists tend to favor determinism?

There seems to be no logical link between matter and determinism (or ideal and indeterminism for that matter). And libertarian free will was first articulated by a materialist, Epicurus, and is ...
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Are arguments based on conceivability refuted by ideas from fantasy and sci-fi?

There are several arguments in metaphysics which are based on "conceivability": The ontological argument for God's existence. Hilary Putnam's Twin Earth argument for semantic externalism (the idea ...
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Are particulars knowable?

In the 13th thesis of the Incoherence, Al-Ghazali refutes the claim of the falsafa (peripatetic) philosophers that particulars aren't knowable by the First. Is this claim made on the basis that ...
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Can a materialist accept indeterminism? Can a reductionist?

The usual argument against it is that if behavior of matter is not fully determined by its state then it has to be determined by something else, ergo dualism. This begs the question however, unless we ...
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Is Socrates a substance?

Consider the following from Aristotles Categories: Substance, in the truest, primary and most definite sense of the word, is that which is neither predicable of a subject nor present in a subject. ...
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What distinguishes species from genus?

In Categories, Aristotle claims that all things that exist are either complex or simple; and the simple things can be classified into ten categories. The first and most basic category includes ...
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Does wave-particle duality pose a challenge to ontology?

Quantum mechanics poses a challenge to epistemology in terms of what is measurable, what is observable, and realism in general. But does it pose a challenge to ontology as well? Ontology is the ...
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Does Aristotle have anything to say about the interpretative paradoxes of QM?

This follows this question The same question, angled a little differently suggests a family resemblence with the measurement paradox in QM: First and most broadly, QM is standardly said to have an ...
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Is Aristotle's resolution of Zeno's paradoxes vindicated by motion in the intuitionistic continuum?

In Physics VIII.8, Aristotle refers to his usual resolution of Zeno's paradox of motion: We should make the same response to anyone who uses Zeno's argument to ask whether it is always necessary ...
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What does it mean to say that Kant has a twofold ontology?

What does it mean to say that Kant has a twofold ontology? If indeed he does have a twofold ontology. Is that like Descartes' res extensa and res cogitans?