The mere addition paradox, parity and vagueness

Philosophy and Phenomenological Research 75 (1):129–151 (2007)
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Abstract

Derek Parfit’s mere addition paradox has generated a large literature. This paper articulates one response to this paradox - which Parfit hirnself suggested - in terms of a formal account of the relation of parity. I term this response the ‘parity view’. It is consistent with transitivity of ‘at least as good as’, but implies incompleteness of this relation. The parity view is compatible with critical-band utilitarianism if this is adjusted to allow for vagueness. John Broome argues against accounts which involve incompleteness. He thinks they are based on an intuition of ‘neutrality’, which is most naturally understood in terms of equality. There is no rationale, on Broome’s view, for seeing it as ‘incommensurateness’ which leads to incompleteness. Parity provides one. Broome’s worries that ‘incommensurateness’ makes neutrality implausibly ‘greedy’, and that ‘incommensurateness’ and vagueness are incompatible do not constitute a knock-down case against the parity view. Similar worries arise for his preferred vagueness view.

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Citations of this work

Totalism without Repugnance.Jacob M. Nebel - 2022 - In Jeff McMahan, Tim Campbell, James Goodrich & Ketan Ramakrishnan (eds.), Ethics and Existence: The Legacy of Derek Parfit. Oxford: Oxford University Press. pp. 200-231.

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