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Issue 31 (March 2012)
The subject of qua-theory (in Polish)
about author
Konrad Werner, MA
Jagiellonian University
Department of Philosophy
ul. Grodzka 52
Pl-31-044 Kraków
e-mail: konradwerner (at) wp.pl
text (PDF)abstract
Konrad Werner, The subject of qua-theory (in Polish), Diametros 31 (March 2012)
There is a specific class of propositions frequently used but almost unknown from the point of view of formal logic. Suppose that A, B, C are names. The propositions “A is B qua C” and “A qua C is B” are called qua-propositions. Roberto Poli introduced the term “qua-theory” in order to separate the special part of logic as well as philosophy focused on qua-propositions – their logical properties and meaning. But as long as some kinds of qua-propositions are not distinguished, the subject of qua-theory cannot be established properly and clearly. In my article I want to examine the proposals of Roberto Poli and Allan Bäck and in effect to propose different classifications of qua-propositions. Also the epistemological context will be important. Different kinds of qua-propositions enable us to distinguish different kinds of epistemological views very generally called “aspectualism”.
Keywords: qua, qua-theory, qua-propositions, aspectuality, aspectual shape, Roberto Poli
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