Logical reasoning PrepTest 151 · Section 3 · Question 1

Incorrect. While it's possible to talk yourself into selecting this answer by thinking that dolphins must encounter electric fields in the wild, or they wouldn't have an organ that can detect them, that's a jump too far. Maybe the organ developed for another reason, and it just happens to also allow for the detection of electric fields.

Correct. Argument or Facts:
Facts

Question Type:
Must Be True

Stimulus Summary:
Dolphins who otherwise act normal will swim away from an electric field. If you cover up an organ they have, they stop doing that.

Answer Anticipation:
Seems the VCs have something to do with the dolphins swimming away from the electric fields.

Answer Explanation:
Here's our answer. With the VCs free, dolphins swim away from electric fields. With them covered, they don't. It's exceptionally likely that the VCs are related to their behavior around electric fields.

Key Takeaway:
For early Must Be True questions, the stimulus will likely present a couple of facts that you should combine without overthinking.

Incorrect. If anything, it appears that dolphins do instinctually avoid electric fields since the ones that were otherwise acting normally swam away from these fields, suggesting that's the normal reaction.

Incorrect. While it is supported that the VCs are related to electric fields, we don't know how. Maybe electric fields interfere with the VC's normal functioning, thus leading the dolphins to freak out or swim away. But it's also possible that the VCs are meant to detect electric fields, and so they're functioning normally when in an electric field, telling a dolphin to turn away, much as a pain receptor isn't having its normal functioning interfered with when it tells you that you just slammed your hand in your car door.

Incorrect. The otherwise-normal dolphins swam away from electric fields, suggesting it's normal for them to be able to detect and want to avoid them.