Solving an Invalid Syllogism oai-3 Question

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The discussion centers on the invalidity of the syllogism form known as oai-3, which is derived from Aristotelian logic. The oai-3 syllogism consists of the premises: "Some S is not P" and "All S is P," leading to a contradiction. Participants emphasize the necessity of providing the specific syllogism to analyze its validity accurately. The conversation highlights the complexity of syllogistic forms and the importance of clarity in logical discussions.

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Daedalus1
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Hi,
I was wondering if anyone could show me why a syllogism of the form oai-3 is invalid.

Thanks :smile:
 
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I was hoping someone else would answer this because I have no idea what "oai-3" means!
 
These are the initials of the famous Aristotelean syllogisms:

A; All S is P

E : No S is P

I : Some S is P

O : Some S is not P

Now an OAI-3 IS combination out of the 600 something ,not all of course valid

I think Deadalus1 must not make his question deadalodic and give us the syllogism
 

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