it is a strengthening question where the conclusion is that descriptive labels have outlived their usefulness.
Because an unusual Grb was sighted that had properties of both.
My issue with the correct ans choice is that the argument says that the unusual GRB had all properties of Short GRB in every other respect other than duration. So if take the ans choice to be true, then other properties would be more important in classification however in that case since we know from stimulus that all other properties were that of a short Grb then we could easily classify the unusual Grb to be a short one.
so i dont see how this strengthens the conclusion for us. In a way i suppose it weakens the argument at best. Could somebody let me know where i am going wrong ?
i can see how others are wrong but cant see how C is correct.
Admin note: edited title
https://classic.7sage.com/lsat_explanations/lsat-72-section-3-question-06/
I guess the easiest way to distinguish between them would be this: when the question stem says which of the following MOST helps to justify then thats a PSA question.
when it mentions: which one the following if assumed would help justify the argument then thats a SA question.
Be on the lookout for the word MOST, that is what differentiates the two.