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1
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On the Philosophical Foundations of the Set Theory

100%
Leśniewski S.
Filozofia Nauki
|
1998
|
vol. 6
|
issue 2
123-139
PL
   
2
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A Contribution to the Analysis of Existential Propositions

100%
Leśniewski S.
Filozofia Nauki
|
1994
|
vol. 2
|
issue 1
117-134
PL
The editors of Stanisław Leśniewski's „Collected Works” inserted into the book an English translation of the Polish original of „A Contribution”. The Russian version of this text, published by Leśniewski in the „Logical Studies”, differs from the original in quite a few important fragments. The Polish original, reprinted here, contains all the modifications introduced into the Russian version. The main thesis of Leśniewski's paper is that all existential propositions are either analytic or self-contradictory.
3
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An Attempt to Give an Ontological Proof of the Principle of Contradiction

88%
Leśniewski S.
Filozofia Nauki
|
1994
|
vol. 2
|
issue 2
117-147
4
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Is Truth Only Eternal or Both Eternal and Perpetual?

88%
Leśniewski S.
Filozofia Nauki
|
2000
|
vol. 8
|
issue 2
135-156
PL
   
5
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The Critique of the Logical Principle of the Excluded Middle

75%
Leśniewski S.
Filozofia Nauki
|
2000
|
vol. 8
|
issue 1
137-169
PL
   
6
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On Definitions in the So-Called Theory of Deduction

75%
Leśniewski S.
Filozofia Nauki
|
2001
|
vol. 9
|
issue 3
165-179
PL
   
7
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The Letters of Stanislaw Lesniewski to Kazimierz Twardowski

75%
Leśniewski S.
Filozofia Nauki
|
1999
|
vol. 7
|
issue 1-2
115-133
PL
   
8
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Foundations of the General Theory of Sets. I

63%
Leśniewski S.
Filozofia Nauki
|
1999
|
vol. 7
|
issue 3-4
173-208
PL
     
9
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At the Root of Three-Valued Logic

51%
Łukasiewicz J., Smolka F., Leśniewski S.
Filozofia Nauki
|
1994
|
vol. 2
|
issue 3-4
227-240
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