Dr. Khan: Professor Burns recognizes that recent observations fail to confirm earlier ones that apparently showed a c...

Ryan on October 21, 2019

Why is C correct? Why is A incorrect?


1 Reply

Irina on November 1, 2019


(A) is incorrect because it is unsupported inference. All we know is that recent observations that failed to confirm prior ones were done under poor conditions, we have no information to infer what the results would be under good conditions. (C) is correct because the claim that the recent observations are sufficient to invalidate prior ones is questionable as the observations were done under poor conditions and are thus, not necessarily reliable. Hence, we can conclude that Professor Burns is likely wrong in using this evidence to invalidate prior results.