October 2010 LSAT Section 1 Question 9

In the first paragraph, the author refers to a highly reputed critic's persistence in believing van Meegeren's forger...

Bola on July 19, 2023

QUESTION 1, OPTION C

I am confused as to why the Sufficient Condition in Premise 1 was not negated. From the S & N classes, when ever there is either in a statement, the Sufficient gets negated.

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Emil-Kunkin on July 19, 2023

Hi, I'm not sure I'm completely understanding your question: are you saying that when we have a statement like "if I go to the park, I will either get rained on or snowed on" would be diagramed along the lines of

If Not P, then R or S?

I don't think we would negate something unless we have a reason to, or are taking the contrapositive, and the presence of an either shouldn't change that.

Bola on July 20, 2023

it says all students at the freeman school of cooking study either deserts or soups. From the S&N classes I would diagram as not SFSC - D or S in 2nd year.

My question is are there exceptions to the rule that when you see "either" in a statement you have to negate the Sufficient condition?

Emil-Kunkin on July 20, 2023

I think you may have mistaken what the lesson said. The statement is that if you're in a school, you do one of two things. Why would we ever turn this into the exact opposite: if you're not in a school, you do one of two things?

It's possible you're thinking of "unless" statements, or maybe of taking the contrapositive.