LSAT 102 | Section 4 | Logical Reasoning: Q6

LR Question 6 Explanation

QUESTION TEXT: The male sage grouse has air sacs that, when not inflated, lie…

QUESTION TYPE: Strengthen

CONCLUSION: The scientists think that the ritual (male sage grouse inflating their air sacs) allows female sage grouse to choose healthy mates.

REASONING: No reasoning is given.

ANALYSIS: We need to find some reason why air sacs are a sign of health.

___________

1. Those lucky guys. Even though they’re unhealthy, they can still get mates. But what does this have to do with air sacs?
2. This doesn’t tell us about air sacs. And it makes things confusing – if antibiotics made the sick grouse healthier, why weren’t they selected?
3. This is weird. Shouldn’t those healthy grouse want to show off their air sacks?
4. CORRECT. If this is true, then maybe the females can use the ritual to judge whether the men have parasites. It’s easier to see parasite if the sacs are inflated.
5. This doesn’t have anything to do with air sacs.

Recap: The question begins with “The male sage grouse has air sacs that, when not inflated, lie”. It is a Strengthen question. Learn more about LSAT Strengthen questions in our guide to LSAT Logical Reasoning question types.