Parfit's reductionist view of personal identity entails that 'long-term survival of oneself' is not a coherent ultimate end, since future selves are not strictly identical to present ones.

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Parfit: Derek Parfit was a highly influential British philosopher known for revolutionizing how we think about personal identity, morality, and what makes life worth living. He argued that our sense of being a continuous, unified "self" is partly an illusion, and that what really matters is the continuation of our thoughts and experiences, not some invisible thread connecting us through time. His ideas have shaped modern ethics and how philosophers approach questions about identity, responsibility, and how we should treat future generations.
Strictly identical(as used in logic and metaphysics): Exactly the same thing in every possible way, with no differences whatsoever.
coherent(de Finetti's usage in the context of the Dutch Book argument for probabilism): A subject is coherent if their unconditional degrees of belief do not permit a Dutch Book (a guaranteed loss through a combination of bets) to be made against them
entails(describes a logical relationship between statements)

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