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DTSTART;TZID=Europe/London:20250625T150000
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DTSTAMP:20260612T135318
CREATED:20250114T182621Z
LAST-MODIFIED:20250415T050958Z
UID:10002338-1750863600-1750870800@www.st-andrews.ac.uk
SUMMARY:Metaphysics and Logic Seminar:
DESCRIPTION:
URL:/philevents/event/metaphysics-and-logic-seminar-45/
LOCATION:Edgecliffe G03
CATEGORIES:Metaphysics and Logic group
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BEGIN:VEVENT
DTSTART;TZID=Europe/London:20250625T150000
DTEND;TZID=Europe/London:20250625T170000
DTSTAMP:20260612T135318
CREATED:20250416T050955Z
LAST-MODIFIED:20250625T123904Z
UID:10002442-1750863600-1750870800@www.st-andrews.ac.uk
SUMMARY:Metaphysics and Logic Seminar: Alessandro Rossi\, The Indeterminacy of Isomorphism Invariance
DESCRIPTION:Abstract: Isomorphism invariance is a popular and well motivated criterion of logicality. Its extensional adequacy\, however\, has been contested on different grounds. Some authors have argued that the criterion overgenerates by counting as logical notions which\, intuitively\, seem to belong to the realm of mathematics. Other authors have contested that the criterion undergenerates by failing to count as logical notions which ought to be so regarded. I argue that isomorphism invariance also faces a more radical objection\, from indeterminacy. In the context of positive free logic (PFL)\, there appear to be two admissible precisifications of isomorphism invariance to test quantification for logicality. These warrant contradictory claims about the logical status of quantifiers. I conclude that the logical status of PFL-quantifiers\, given isomorphism invariance\, is unknowable and thus indeterminate. I will consider two objections aiming to establish one precisification of isomorphism invariance as the intended one\, but I found both of them unconvincing.
URL:/philevents/event/metaphysics-and-logic-seminar-tba-31/
LOCATION:Edgecliffe G03
CATEGORIES:Metaphysics and Logic group
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