(D) does something that many incorrect answer choices do on the LSAT — particularly in Reading Comprehension questions and LR Must Be True questions. The passage gave us one example of a technique that is easy to learn and yielded accurate information (telling the eyewitnesses to close their eyes). But just because there’s one example of a technique that’s easy to learn and yields accurate results doesn’t mean that techniques that are easy to learn generally yield accurate results. It could be the case that telling the eyewitnesses to close their eyes is the only technique that’s both easy and accurate. In other words, (D) is wrong because it commits a sampling flaw.
Additionally, one example of a technique that is easy to learn and yields accurate information definitely won’t prove that the easier something is to learn, the more accurate the details will be. It’s extremely difficult to prove this kind of proportional, or sliding scale, relationship. Answer choices that assert such relationships are almost never correct on RC and LR Must Be True questions.
