by ManhattanPrepLSAT1 Fri May 06, 2016 3:33 am
Question: If the food was purchased yesterday then it is fresh, and the food was either purchased yesterday or two days ago, but not both.
We can infer that…
Answers:
(A) If the food is not fresh, then is was purchased two days ago. (Correct Answer)
(B) If the food is fresh, then is was not purchased two days ago.
Hi isaacbeller, happy to help here. These statements are actually logical negations of each other. The difference is similar to the difference in the following two statements.
If one lives in Boston, one lives in Massachusetts.
If one does NOT live in Boston, then one does NOT live in Massachusetts.
Obviously, the first statement is true based on what's true in the real word. But negating the terms doesn't imply a true statement. One could live in Massachusetts and yet live in some other city besides Boston.
Be on the lookout for logically negated statements. They often represent tempting and yet wrong answers on the LSAT. Hope that helps!