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For sufficient assumption questions I am a bit confused of whether or not we are allowed to use the contrapositives of the argument for the answer. For example if we have
A
B
the link we need to make is A->B but if one of the answers are /B->/A would that be the right answer choice?
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1 comments
Yes because /B->/A is the same thing as saying A->B
For example, We need to justify this argument that says "All college students use ChatGPT to write their assignments. Therefore, all students are lazy."
The sufficient assumption here is "If one uses ChatGPT to write their assignments, then they are lazy," which fully connects the example's arguement.
But the contrapositive for this would also be true: "If one is not lazy, then they don't use ChatGPT to write their assignments." This is because if we flip and negate this conditional, then we get the exact SA without any negatives that we derived early. The contrapositive works because, in the sufficient, for one to use ChatGPT to write their assignments, they MUST be lazy (it is necessary for a ChatGPT user!). If they are not lazy, then they don't use ChatGPT. It works the same way and means the same exact thing.
You will see the contrapositives more frequently on harder questions-- but that does not mean there is any difference in meaning if you flip and negate that AC.