Which one of the following statements most accurately characterizes a difference between the two passages?

rdavidjr84 on July 6, 2019

Valid vs invalid

X is name sue....this was flagged as an invalid argument because of the premise anyone named Sue is a girl....why is this premise flawed...I didn't quite find that this was explained? Based on both premise it followed logically that x is a girl. Thanks Rick

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Victoria on July 6, 2019

Hi Rick,

The reasoning provided in the video as to why the premise is flawed is the Johnny Cash song "A Boy Named Sue." If at least one boy is named Sue, then it does not have to be true that anyone named Sue is a girl, making this premise invalid.

The vast majority of the time, you should assume that the premises presented to you are true. This example was included to ensure that you keep in the back of your mind that there is the possibility for the LSAT to present you with a false premise. False premises are usually obviously false so they are relatively easy to spot; however, unless the flaw is obvious, assume that the premises presented to you are true.

Hope this helps! Please let us know if you have any further questions.

rdavidjr84 on July 7, 2019

That is perfect...thank you so much for clarifying that for me. That makes more sense to me now :)

Victoria on July 8, 2019

No worries Rick! Happy to help.

Please feel free to reach out if you need any clarification on other problems!