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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.
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] In physical terms, reality is the totality of a system, known and unknown. [2]
The concept must exist either only in our mind, or in both our mind and in reality. If such a being exists only in our mind, then a greater being—that which exists in the mind and in reality—can be conceived (this argument is generally regarded as a reductio ad absurdum because the view of the fool is proven to be inconsistent). Therefore ...
Another distinction exists between concrete objects existing in space and time, such as a tree, and abstract objects existing outside space and time, like the number 7. Systems of categories aim to provide a comprehensive inventory of reality by employing categories such as substance, property, relation, state of affairs, and event.
Buddhism perceives reality occurring on two different levels: the ultimate reality, which can only be truly understood by the enlightened ones, and the illusory or false reality of the material world, which is considered to be "real" or "true" by those who are ignorant about the nature of metaphysical reality; i.e., those who still haven't ...
Within German idealism, objective idealism identifies with the philosophy of Friedrich Schelling. [4] According to Schelling, the rational or spiritual elements of reality are supposed to give conceptual structure to reality and ultimately constitute reality, to the point that nature and mind, matter and concept, are essentially identical: their distinction is merely psychological and depends ...
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.
McTaggart argued that the description of events as existing in absolute time is self-contradictory, because the events have to have properties about being in the past and in the future, which are incompatible with each other. McTaggart viewed this as a contradiction in the concept of time itself, and concluded that reality is non-temporal.