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It is the branch of philosophy that investigates the nature of existence, the features all entities have in common, and how they are divided into basic categories of being. [1] It aims to discover the foundational building blocks of the world and characterize reality as a whole in its most general aspects.
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.
Sartre states that "Consciousness is a being such that in its being, its being is in question insofar as this being implies a being other than itself." Existence: Concrete, individual being-for-itself here and now. Existence precedes essence. The subjective existence of reality precedes and defines its nature.
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]
Philosophy addresses two different aspects of the topic of reality: the nature of reality itself, and the relationship between the mind (as well as language and culture) and reality. On the one hand, ontology is the study of being, and the central topic of the field is couched, variously, in terms of being, existence, "what is", and reality.
Solipsism (/ ˈ s ɒ l ɪ p s ɪ z əm / ⓘ SOLL-ip-siz-əm; from Latin solus 'alone' and ipse 'self') [1] is the philosophical idea that only one's mind is sure to exist. As an epistemological position, solipsism holds that knowledge of anything outside one's own mind is unsure; the external world and other minds cannot be known and might not exist outside the mind.
Herbert Marcuse criticized Being and Nothingness for projecting anxiety and meaninglessness onto the nature of existence itself: "Insofar as Existentialism is a philosophical doctrine, it remains an idealistic doctrine: it hypostatizes specific historical conditions of human existence into ontological and metaphysical characteristics ...
In German, Dasein is the vernacular term for "existence". It is derived from da-sein, which literally means "being-there" or "there-being". [3] In a philosophical context, it was first used by Leibniz and Wolff in the 17th century, as well as by Kant and Hegel in the 18th and 19th; however, Heidegger's later association of the word with human existence was uncommon and not of special ...