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Bolzano's Logical System$
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Ettore Casari

Print publication date: 2016

Print ISBN-13: 9780198788294

Published to Oxford Scholarship Online: January 2017

DOI: 10.1093/acprof:oso/9780198788294.001.0001

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Higher Level

Higher Level

(p.233) 6 Higher Level
Bolzano's Logical System

Ettore Casari

Oxford University Press

In this chapter, on the higher level, the exposition of Bolzano’s theory takes into account that qualities are also objects and so in turn bearers of qualities. Moreover, the question is discussed whether or not Bolzano admitted empty qualities, and the Bolzanian complex theory of ‘tropes’ is illustrated. Besides this, an attempt is made to clarify the exact meaning of the Bolzanian insight into the strict parallelism between reference of an idea and truth of a proposition.

Keywords:   empty quality, trope, parallelism between reference and truth

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