Philosophy Lexicon of Arguments

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d’Abro, A.
 
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Non-Existence A. d'Abro Die Kontroversen über das Wesen der Mathematik 1939 in Kursbuch 8 Mathematik 1967

42
Non-existence/Meinong/d'Abro: since we can truthfully say "something like a round square does not exist," there must be something like a round square, albeit as a non-existent object. At first Russell had not been able to escape this, but in 1905 he discovered a theory of representation, according to which the round square seems to be mentioned when one says: "A round square does not exist." (Principia Mathematica)
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IV 43
Existence/d'Abro: in Meinong "exist" and "there is" are used synonymously, but they are not synonyms: exist in the mathematical sense means to contain no contradiction.
If one takes Meinong seriously, this is evidence of the inability to think clearly, as in the joke: "Where does the light go when it goes out?".
Thus, a proof of existence for a solution is the finding that no contradiction arises from the assumption of a solution, even if the solution is not yet known.
d’Abro, A.




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Ed. Martin Schulz, access date 2017-04-30