Abstract
In the next three sections we will investigate the effects of including the identity predicate in a.d.1-logics on the is-ought problem. We will meet some unexpected facts. First we introduce the basic definitions.
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Notes
An answer may be found by looking for non-augmented neighbourhood models for a.d.2-logics which do not validitate closure under (GVR).
As in def. 13, the notion of an extended BP includes essential as well as inessential BPs, where the inessential ones are equivalently replaceable by non-BPs.
Moore (1903, p. 110ff) has called them “metaphysical” positions.
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© 1997 Springer Science+Business Media Dordrecht
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Schurz, G. (1997). The Problems of Identity and Existence. In: The Is-Ought Problem. Trends in Logic, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-3375-5_10
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DOI: https://doi.org/10.1007/978-94-017-3375-5_10
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-4795-3
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