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Are ghosts real? 

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Ghosts are not real. The term "ghost" is used in theoretical physics to refer to an object that has no real physical meaning . In the context of fin-de-siecle ghost stories, realism is used as a literary device to create sophisticated and experimental narratives . In the field of real-time strategy AI development, GHOST is a combinatorial optimization framework used to model and solve problems, but it does not involve actual ghosts . In the context of theatre, ghosts are a part of the theatrical experience and are created through stagecraft and props, but they are not real entities .

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The answer to the query "are ghosts real?" is not provided in the paper. The paper discusses the presence of ghosts in theatre as a memorial practice haunted by loss, but it does not address the reality of ghosts outside of the theatrical context.
Open accessJournal ArticleDOI
08 Apr 2009-Scholarpedia
9 Citations
Ghosts are not real in the physical sense. They are fictitious fields introduced in theoretical physics to deal with unphysical degrees of freedom in gauge invariant theories.
Ghosts are not real physical objects, but rather fictitious fields introduced in theoretical physics to deal with unphysical degrees of freedom in gauge invariant theories.
The provided paper is about a combinatorial optimization framework called GHOST. It does not discuss the existence of ghosts.

Related Questions

Are ghosts real?5 answersGhosts, in the context of theoretical physics, are objects that have no real physical meaning. The term "Faddeev-Popov ghosts" refers to fictitious fields introduced in the quantization of the Yang-Mills field and later applied in string theory. The necessity of ghosts arises from gauge invariance, where the number of local fields exceeds the physical degrees of freedom. To maintain manifest Lorentz invariance, a mechanism is needed to eliminate the unphysical degrees of freedom. Introducing fictitious fields, the ghosts, is one way to achieve this goal. However, it is important to note that this discussion pertains to theoretical physics and not to the existence of supernatural entities or spirits commonly referred to as ghosts in popular culture.
What evidence is there for the existence of ghosts?5 answersThere is evidence for the existence of ghosts. The experience of ghosts is found in all human societies and is not disappearing. In cases of alleged hauntings, trustworthy witnesses consistently report experiencing unusual phenomena in certain locations. However, it is suggested that these experiences may not necessarily represent evidence for 'ghostly' activity, but could be the result of people responding to 'normal' factors in their surroundings.
Is astral projection real?4 answersAstral projection is a concept that involves the belief in an out-of-body experience, where a person's consciousness can leave their physical body and travel to different realms or dimensions. While proponents of astral projection claim various benefits and attempt to link it to scientific theories, there is a lack of empirical evidence and scientific basis to support these claims. However, there are reports of out-of-body experiences being associated with certain psychiatric disorders, brain dysfunctions, altered psychological states, and other factors. Astral projection is also explored in the context of postmodern fiction, where it is presented as a way to deconstruct ideas and explore ontological issues. In the study of astral sciences in ancient China, narratives were used to instill a sense of unity, but the messy realities of practice reveal the disunities in scientific cultures. Overall, while astral projection remains a topic of interest and exploration, its reality and scientific validity are still subject to debate and skepticism.
Are souls real?5 answersSouls are a controversial topic, with belief in them being more common among the general population than among philosophers and scientists. However, there are authors who argue for the existence of the soul as a metaphysical essence of human existence. These authors explore the structure, functioning, and genesis of the soul, and emphasize its role in human consciousness and self-realization. They argue that the soul is the basis for the transcendence of the human person, allowing them to go beyond the physical order and reveal themselves as spiritual beings. While the existence of the soul cannot be detected by science, these authors propose that it is a metaphysical principle that underlies human nature and the development of rational habits and values. They also discuss the implications of the existence of the soul for bioethical discussions about death and harm.
Is hypnosis real?5 answersHypnosis has been shown to be a real phenomenon with therapeutic uses, particularly in pain control. The early origins of hypnosis are shrouded in mystery and magic, but it has been studied and debated by various schools of thought throughout history. Hypnosis is considered a reality in human experience and can influence subsequent behavior. Despite the extensive research on hypnotic phenomena and techniques, the true nature of hypnosis remains unknown. There is broad agreement that hypnosis exists, but there is no universally accepted definition for it. The mechanisms underlying hypnosis and how it differs from other cognitive states are still largely unknown. While hypnotizability assessment may not reliably predict clinical outcomes, hypnosis has been found to be beneficial for various medical, psychiatric, and dental disorders.
Do ghosts exist?1 answersGhosts, as supernatural entities, are not addressed in the abstracts provided. The abstracts discuss various topics such as the self-accelerating universe in the DGP model and its instability, syncretic beliefs and their association with everyday communicative activity in Malaysia, theories with curvature-squared terms and the emergence of ghost modes, and the search for antipodal quasar pairs within a compact multi-connected flat universe. None of these abstracts provide evidence or discussion on the existence of ghosts.

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