Existence

existsexistabsencenonexistencenon-existencenonexistentabsolutely existentdo not actually existExistence / Non-existenceexistential
Existence is the ability of an entity to interact with physical or mental reality.wikipedia
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Philosophy

philosophicalphilosopherhistory of philosophy
In philosophy, it refers to the ontological property of being.
Philosophy (from Greek φιλοσοφία, philosophia, literally "love of wisdom") is the study of general and fundamental questions about existence, knowledge, values, reason, mind, and language.

Ontology

ontologicalontologicallyontologies
In philosophy, it refers to the ontological property of being. The exact definition of existence is one of the most important and fundamental topics of ontology, the philosophical study of the nature of being, existence, or reality in general, as well as of the basic categories of being and their relations.
More broadly, it studies concepts that directly relate to being, in particular becoming, existence, reality, as well as the basic categories of being and their relations.

Being

beingsbePhilosophy of Being
In philosophy, it refers to the ontological property of being. In a technical sense, this refers to standing out of both being and becoming, thus having the qualities of both. The exact definition of existence is one of the most important and fundamental topics of ontology, the philosophical study of the nature of being, existence, or reality in general, as well as of the basic categories of being and their relations.
In philosophy, being means the material or immaterial existence of a thing.

Reality

real worldrealreality-based
Existence is the ability of an entity to interact with physical or mental reality.
The question of whether or not existence is a predicate has been discussed since the Early Modern period, not least in relation to the ontological argument for the existence of God.

Metaphysics

metaphysicalmetaphysicianmetaphysic
Traditionally listed as a part of the major branch of philosophy known as metaphysics, ontology deals with questions concerning what things or entities exist or can be said to exist, and how such things or entities can be grouped, related within a hierarchy, and subdivided according to similarities and differences.
Topics of metaphysical investigation include existence, objects and their properties, space and time, cause and effect, and possibility.

Becoming (philosophy)

becomingcoming to bein fieri'' (becoming)
In a technical sense, this refers to standing out of both being and becoming, thus having the qualities of both.
In philosophy, becoming is the possibility of change in a thing that has being, that exists.

Noumenon

noumenanoumenalDing an sich
As a form of epistemological idealism, rationalism interprets existence as cognizable and rational, that all things are composed of strings of reasoning, requiring an associated idea of the thing, and all phenomena (including consciousness) are the result of an understanding of the imprint from the noumenal world in which lies beyond the thing-in-itself.
Taken together, Kant's "categories of understanding" are the principles of the human mind which necessarily are brought to bear in attempting to understand the world in which we exist (that is, to understand, or attempt to understand, "things in themselves").

Plato

Plato's dialoguesDialogues of PlatoPlatonic dialogues
In the Western tradition of philosophy, the earliest known comprehensive treatments of the subject are from Plato's Phaedo, Republic, and Statesman and Aristotle's Metaphysics, though earlier fragmentary writing exists.
Wisdom is knowledge about the Good or the right relations between all that exists.

Nominalism

nominalistnominalistsnominalistic
At about the same time, the nominalist philosopher William of Ockham argued, in Book I of his Summa Totius Logicae (Treatise on all Logic, written some time before 1327), that Categories are not a form of Being in their own right, but derivative on the existence of individuals.
The Platonist answer is that all the green things are green in virtue of the existence of a universal: a single abstract thing that, in this case, is a part of all the green things.

Ontological argument

ontological proofontologicalOntological argument for the existence of God
If neither A nor B includes the idea of existence, then "some A are B" simply adjoins A to B. Conversely, if A or B do include the idea of existence in the way that "triangle" contains the idea "three angles equal to two right angles", then "A exists" is automatically true, and we have an ontological proof of A's existence.
If that organizational structure is true, the argument will provide reasons why God must exist.

Materialism

materialistmaterialisticmaterialists
Materialism holds that the only things that exist are matter and energy, that all things are composed of material, that all actions require energy, and that all phenomena (including consciousness) are the result of the interaction of matter.

Category of being

categoriescategories of beingcategory
The exact definition of existence is one of the most important and fundamental topics of ontology, the philosophical study of the nature of being, existence, or reality in general, as well as of the basic categories of being and their relations.

Copula (linguistics)

copulato becopular
Thus every proposition has three components: the two terms, and the "copula" that connects or separates them.
This use is illustrated in the following sentences: I want only to be, and that is enough; I think therefore I am; To be or not to be, that is the question. In these cases, the verb itself expresses a predicate (that of existence), rather than linking to a predicative expression as it does when used as a copula.

Medieval philosophy

medievalmedieval philosophersmedieval philosopher
The medieval philosopher Thomas Aquinas argued that God is pure being, and that in God essence and existence are the same.

Nagarjuna

NāgārjunaAcharya NagarjunaNagarjuna’s
The Indian philosopher Nagarjuna (c.
This is so because all things arise always dependently: not by their own power, but by depending on conditions leading to their coming into existence, as opposed to being.

Madhyamaka

MadhyamikaMādhyamakaMādhyamika
150–250 CE) largely advanced existence concepts and founded the Madhyamaka school of Mahāyāna Buddhism.
The empirical world of appearances is considered unreal, and not absolutely existent.

Human condition

humanityhuman experiencethe human condition
The human condition is "the characteristics, key events, and situations which compose the essentials of human existence, such as birth, growth, emotionality, aspiration, conflict, and mortality".

Existence precedes essence

essenceexistence or essenceExistence preced[ing] essence
The proposition that existence precedes essence (l'existence précède l'essence) is a central claim of existentialism, which reverses the traditional philosophical view that the essence (the nature) of a thing is more fundamental and immutable than its existence (the mere fact of its being).

Alexius Meinong

MeinongAlexius von Meinong
According to the "two sense" view of existence, which derives from Alexius Meinong, existential statements fall into two classes.
He is most noted, however, for his Über Gegenstandstheorie (Theory of Objects, 1904), which grew out of his work on intentionality and his belief in the possibility of intending nonexistent objects.

Sayf al-Din al-Amidi

al-Amidi
His work, A Treatise on Book Titles, he writes on existence, and how time and place are associated with existence.

Property (philosophy)

propertypropertiesattribute
In philosophy, it refers to the ontological property of being.

Latin

Latin languageLat.la
The word "existence" comes from the Latin word exsistere meaning "to appear", "to arise", "to become", or "to be", but literally, it means "to stand out" (ex- being the Latin prefix for "out" added to the causative of the verb stare, meaning "to stand").

Matter

corporealsubstancematerial
Materialism holds that the only things that exist are matter and energy, that all things are composed of material, that all actions require energy, and that all phenomena (including consciousness) are the result of the interaction of matter.

Energy

energy transferenergiestotal energy
Materialism holds that the only things that exist are matter and energy, that all things are composed of material, that all actions require energy, and that all phenomena (including consciousness) are the result of the interaction of matter.

Phenomenon

phenomenaphenomenalphysical phenomena
Materialism holds that the only things that exist are matter and energy, that all things are composed of material, that all actions require energy, and that all phenomena (including consciousness) are the result of the interaction of matter.