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Reasons and Persons is a 1984 book by the philosopher Derek Parfit, in which the author discusses ethics, rationality and personal identity. It is divided into four parts, dedicated to self-defeating theories, rationality and time, personal identity and responsibility toward future generations .
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. [1]
In Part I of Reasons and Persons Parfit discussed self-defeating moral theories, namely the self-interest theory of rationality ("S") and two ethical frameworks: common-sense morality and consequentialism. He posited that self-interest has been dominant in Western culture for over two millennia, often making bedfellows with religious doctrine ...
The mere addition paradox (also known as the repugnant conclusion) is a problem in ethics identified by Derek Parfit and discussed in his book Reasons and Persons (1984). The paradox identifies the mutual incompatibility of four intuitively compelling assertions about the relative value of populations.
The problem was described and explored by Derek Parfit in his 1987 book Reasons and Persons. [2] It is a challenge to person-affecting views, which are based on the intuition that "what is bad must be bad for someone". [3] An example proposed by Parfit involves thinking of two policies: "conservation" and "depletion".
Mere addition paradox: (Parfit's paradox) Is a large population living a barely tolerable life better than a small, happy population? Moore's paradox : "It's raining, but I don't believe that it is." Newcomb's paradox : A paradoxical game between two players, one of whom can predict the actions of the other.
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 Parfit. This debate about further facts concerning personal identity over time is most closely associated with Derek Parfit. In his Reasons and Persons, he describes the non-reductionist's view that "personal identity is a deep further fact, distinct from physical and psychological continuity". [1]