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In anthropology, liminality (from Latin limen 'a threshold') [1] is the quality of ambiguity or disorientation that occurs in the middle stage of a rite of passage, when participants no longer hold their pre-ritual status but have not yet begun the transition to the status they will hold when the rite is complete. [2]
Chronemics is an anthropological, philosophical, and linguistic subdiscipline that describes how time is perceived, coded, and communicated across a given culture. It is one of several subcategories to emerge from the study of nonverbal communication.
The term was coined by Thomas Suddendorf and Michael Corballis, [1] building on Endel Tulving's work on episodic memory. [2] (Tulving proposed the alternative term chronesthesia. [3]) Mental time travel has been studied by psychologists, cognitive neuroscientists, philosophers and in a variety of other academic disciplines.
Smeenk uses the term "predestination paradox" to refer specifically to situations in which a time traveler goes back in time to try to prevent some event in the past. [ 7 ] The "predestination paradox" is a concept in time travel and temporal mechanics, often explored in science fiction.
Seth Lloyd proposed an alternative approach to time travel with closed timelike curves (CTCs), based on "post-selection" and path integrals. [21] Path integrals are a powerful tool in quantum mechanics that involve summing probabilities over all possible ways a system could evolve, including paths that do not strictly follow a single timeline ...
Time travel is the hypothetical activity of traveling into the past or future. Time travel is a concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a device known as a time machine. The idea of a time machine was popularized by H. G. Wells's 1895 novel The Time ...
The phrase was first used in sociology by Morton Grodzins when he adopted the phrase from physics where it referred to the adding a small amount of weight to a balanced object until the additional weight caused the object to suddenly and completely topple, or tip. Grodzins studied integrating American neighborhoods in the early 1960s.
Illustration from a 1916 advertisement for a vocational school in the back of a US magazine. Education has been seen as a key to social mobility and the advertisement appealed to Americans' belief in the possibility of self-betterment as well as threatening the consequences of downward mobility in the great income inequality existing during the Industrial Revolution.