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Personal identity is the unique numerical identity of a person over time. [1] [2] Discussions regarding personal identity typically aim to determine the necessary and sufficient conditions under which a person at one time and a person at another time can be said to be the same person, persisting through time.
Derek Antony Parfit FBA (/ ˈ p ɑːr f ɪ t /; 11 December 1942 – 2 January 2017 [3] [4]) was a British philosopher who specialised in personal identity, rationality, and ethics.
It deals with standard problems in the theory of personal identity and its relation to immortality and life after death in the form of a dialogue between a terminally ill university professor at a small Midwestern college, Gretchen Weirob, and her two friends, Sam Miller and Dave Cohen.
Autobiographical memory performs a self-representative function by using personal memories to create and maintain a coherent self-identity over time. [3] This self-continuity is the most commonly referred to self-representative function of autobiographical memory. [13]
Locke claimed that personal identity is not from having the same body or the same soul but from having the same consciousness and memory. According to Locke, memory is the "glue" that ties the various stages of our life together and constitutes sameness of person. This section of the Analogy is the only widely read part of it today. [3]
The teletransportation paradox or teletransport paradox (also known in alternative forms as the duplicates paradox) is a thought experiment on the philosophy of identity that challenges common intuitions on the nature of self and consciousness, formulated by Derek Parfit in his 1984 book Reasons and Persons.
The theory of narrative identity postulates that individuals form an identity by integrating their life experiences into an internalized, evolving story of the self that provides the individual with a sense of unity and purpose in life. [1] This life narrative integrates one's reconstructed past, perceived present, and imagined future.
Many theories of development have aspects of identity formation included in them. Two theories directly address the process of identity formation: Erik Erikson's stages of psychosocial development (specifically the Identity versus Role Confusion stage), James Marcia's identity status theory, and Jeffrey Arnett's theories of identity formation in emerging adulthood.