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The existential quantifier ∃ is often used in logic to express existence.. Existence is the state of having being or reality in contrast to nonexistence and nonbeing.Existence is often contrasted with essence: the essence of an entity is its essential features or qualities, which can be understood even if one does not know whether the entity exists.
It is not universally accepted that there is a clear boundary between metaphysics and ontology. Some philosophers use both terms as synonyms. [11] The etymology of the word ontology traces back to the ancient Greek terms ὄντως (ontos, meaning ' being ') and λογία (logia, meaning ' study of '), literally, ' the study of being '.
Metaphysicians often regard existence or being as one of the most basic and general concepts. [26] To exist means to be part of reality, distinguishing real entities from imaginary ones. [27] According to a traditionally influential view, existence is a property of properties: if an entity exists then its properties are instantiated. [28]
Existentialism is a family of philosophical views and inquiry that prioritize the existence of the human individual, study existence from the individual's perspective, and conclude that, despite the absurdity or incomprehensibility of the universe, individuals must still embrace responsibility for their actions and strive to lead authentic lives.
Also called humanocentrism. The practice, conscious or otherwise, of regarding the existence and concerns of human beings as the central fact of the universe. This is similar, but not identical, to the practice of relating all that happens in the universe to the human experience. To clarify, the first position concludes that the fact of human existence is the point of universal existence; the ...
[3] [1] [5] But it can also be employed in a more literal sense as a crisis of existence to express that the existence of something is threatened. In this sense, a country, a company, or a social institution faces an existential crisis if political tensions, military threats , high debt, or social changes may have as a result that the ...
Reality is the sum or aggregate of all that is real or existent within the universe, as opposed to that which is only imaginary, nonexistent or nonactual.The term is also used to refer to the ontological status of things, indicating their existence. [1]
Ontology is the study of concepts of existence, and of recognition of entities. The words ontic and entity are derived respectively from the ancient Greek and Latin present participles that mean "being".