Lexicon of Arguments

 Philosophical and Scientific Issues in Dispute
 
[german]


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Theses I
Theses II

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II 93f
Ravens paradox/Hempel/Goodman: e.g. a given object (a piece of paper) is neither black nor a raven which confirms the hypothesis:
"All non-black objects are not ravens."
But this hypothesis is logically equivalent to:
"All ravens are black".
The ability to operate ornithology in the room should make the unauthorized recourse to facts that are not mentioned in our example suspicious.
Even worse:
"Anything that is not a raven is not black."
"Everything that is not black is not a raven."
"Nothing is black or a raven." (> Not ravens).
Our definition is faulty in a way that it does not require to consider all existing data.
>Method.

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