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  2. Ontology - Wikipedia

    en.wikipedia.org/wiki/Ontology

    Ontology is the philosophical study of being. As one of the most fundamental concepts, being encompasses all of reality and every entity within it. To articulate the basic structure of being, ontology examines what all entities have in common and how they are divided into fundamental classes, known as categories.

  3. Existence - Wikipedia

    en.wikipedia.org/wiki/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.

  4. Metaphysics - Wikipedia

    en.wikipedia.org/wiki/Metaphysics

    Definition. Metaphysics is the study of the most general features of reality, including existence, objects and their properties, possibility and necessity, space and time, change, causation, and the relation between matter and mind. It is one of the oldest branches of philosophy. [1]

  5. Person - Wikipedia

    en.wikipedia.org/wiki/Person

    Person. A person (pl.: people or persons, depending on context) is a being who has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. [1][2][3][4] The defining ...

  6. Being and Time - Wikipedia

    en.wikipedia.org/wiki/Being_and_Time

    Being and Time (German: Sein und Zeit) is the 1927 magnum opus of German philosopher Martin Heidegger and a key document of existentialism. Being and Time is among the most influential texts of 20th century philosophy. It had a notable impact on subsequent philosophy, literary theory and many other fields.

  7. Heideggerian terminology - Wikipedia

    en.wikipedia.org/wiki/Heideggerian_terminology

    Heideggerian terminology. Martin Heidegger, the 20th-century German philosopher, produced a large body of work that intended a profound change of direction for philosophy. Such was the depth of change that he found it necessary to introduce many neologisms, often connected to idiomatic words and phrases in the German language.

  8. Being and Nothingness - Wikipedia

    en.wikipedia.org/wiki/Being_and_Nothingness

    Being and Nothingness. Being and Nothingness: An Essay on Phenomenological Ontology (French: L'Être et le néant : Essai d'ontologie phénoménologique), sometimes published with the subtitle A Phenomenological Essay on Ontology, is a 1943 book by the philosopher Jean-Paul Sartre. In the book, Sartre develops a philosophical account in support ...

  9. Meaning of life - Wikipedia

    en.wikipedia.org/wiki/Meaning_of_life

    The meaning of life is "freedom from suffering" through apatheia (Gr: απαθεια), that is, being objective and having "clear judgement", not indifference. Stoicism's prime directives are virtue , reason , and natural law , abided to develop personal self-control and mental fortitude as means of overcoming destructive emotions .