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June 2002 LSAT Section 2 Question 3

Joan got A's on all her homework assignments, so if she had gotten an A on her term paper, she could pass the course ...

Anthony-Resendes on December 11, 2020

Confused

So the author assuming at the beginning that if Joan had gotten an A on her paper then she would not have to do the class presentation if the flaw of the argument?

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shunhe on January 7, 2021

Hi @Anthony-Resendes,

Thanks for the question! The flaw os the argument is that there’s a mistaken negation. The premises are:

Gets A —> Passes without doing class presentation
~ Gets A

Conclusion: ~Passes without doing class presentation

(B) is a very convoluted way of getting at this mistaken reversal. Basically, the argument presupposes ~ Gets A —> ~Passes without doing class presentation, since it can’t get that from the premises it already has.

Hope this helps! Feel free to ask any other questions that you might have.