June 1997 LSAT - Section 2 - Question 19
StasDAllen February 5, 2021
You can find the explanation at the link below. I end up using that site a lot because they actually explain answers that aren't on here.Emil-Kunkin October 6, 2024
The author is trying to prove that the meteor did not cause the extinction. Therefore, it doesn't matter to the author if it was or was not big enough. The author is trying to prove it was not the cause, so it being big enough would actually work against the author, not be something they would have to believe.