Dreamless sleep is a recognized discontinuity of the same type as deep anesthesia, and both are bracketed by Parfit as cases where the criterion applies diachronically across waking episodes, not synchronically through each instant.

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1 reason against

Reasons For

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Reason for

1.Personal identity persists through gaps in consciousness if psychological continuity connects pre- and post-gap mental states.
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2.Dreamless sleep and anesthesia share the feature of interrupting consciousness while preserving causal chains of memory and intention.
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3.Synchronic criteria (unity within moments) cannot account for survival through any sleep, so diachronic criteria are necessary and sufficient.
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Reasons Against

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Reason against

1.Dreamless sleep involves brain activity and implicit memory encoding, unlike anesthesia, making them categorically different discontinuities.
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2.Diachronic criteria require identity-constituting relations between episodes, but temporal gaps create inferential gaps in what grounds identity.
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3.If discontinuity is 'recognized' as such, we need positive evidence that identity *can* traverse it, not just that synchronic criteria fail.
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Key Terms

Bracketed (philosophical usage)(dreamless sleep and anesthesia are bracketed together as similar cases): Grouped together or treated as the same type of thing for the purposes of analysis, even if they differ in other ways.
Criterion (of personal identity)(Parfit's theory uses a specific criterion to judge identity): A test or rule for deciding whether the same person exists at two different times, even if they've changed a lot.
Derek Parfit(as a philosopher being cited for his theory on personal identity): A highly influential philosopher who argued that personal identity (what makes you 'you' over time) is less important than we think, and that we're not the unified, continuous selves we assume we are.
Diachronically(contrasted with synchronically in the statement): Across different moments in time, looking at how things connect from one time period to another.
Synchronically(contrasted with diachronically in the statement): Within a single moment in time, focusing on how things exist right now rather than how they change over time.
Waking episodes(the statement discusses how identity connects across different waking episodes): Separate periods when you're awake and conscious, as opposed to being asleep or unconscious.
discontinuity(Arises when the direction of rotation must switch or when rotation must abruptly stop at a particular announced value.): An abrupt change in the action taken as a function of the announced angle, violating continuous dependence.

Connections

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Personal Identity1 linked

Diachronic criteria require identity-constituting relations between episodes, bu...Dreamless sleep and anesthesia share the feature of interrupting consciousness w...Dreamless sleep involves brain activity and implicit memory encoding, unlike ane...If discontinuity is 'recognized' as such, we need positive evidence that identit...

Details

Type: claim
Perspectives: 2 (1 for, 1 against)
Edits: 1 edit