Question

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abdulnoor

Traditional Square of Opposition

Contrary = At least one must be false (not both true, but both could be false)                                        

Subcontrary = At least one must be true (not both false, but both could be true)                                 

Contradictory = Opposite truth value                                                                                                           

Subalternation = Truth flows downward; falsity flows upward.

 


Question: Using the Traditional Square of Opposition above, if "All X are Y" is true, what would the truth value of "Some X are not Y" be?

 

Select one:
 a. False
 b. True
 c. Undetermined

asked on Monday, Apr 17, 2023 04:42:09 PM by abdulnoor

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TrappedPrior (RotE) writes:

This isn't a homework forum. You should only make posts asking about fallacies you think have been committed in a hypothetical or real-world example.

posted on Monday, Apr 17, 2023 05:40:38 PM

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Darren
0

This reads like it was copied from an exam in a Logic class.  

in any event, I think the answer is pretty obvious (if you think about what the two sentences are saying), even without using these definitions or any formal logic system.  

answered on Monday, Apr 17, 2023 05:03:58 PM by Darren

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