LSAT 21 | Section 2 | Logical Reasoning: Q18

LR Question 18 Explanation

QUESTION TEXT: All of the cargo ships of the Blue Star Line are over…

QUESTION TYPE: Must be True

FACTS:

1. Blue star ships are over 100 meters if they are cargo ships and under 100 if they are passenger ships. Most of the ships were built before 1980.
2. All of the Gold Star ships are less than 100 meters and were built after 1980.
3. Ships over 100 meters can’t dock at Port Tropica.
4. S.S. Coral is docked at Port Tropica and is a cargo ship.

ANALYSIS: Only Gold Star has cargo ships shorter than 100 meters. So the S.S. Coral must be a Gold Star Ship. Since that’s the case, it must also have been built after 1980.

___________

1. CORRECT. This has to be true because the Coral is a Gold Star ship. That has to be true because only Gold Star cargo ships are less than 100 meters long.
2. We know this is false, since Blue Star cargo ships are over 100 meters.
3. This doesn’t have to be true. We only know that Port Tropica has one cargo ship docked at it. There could be passenger ships too.
4. We only know that cargo ships from the Blue Star Line can’t go to Port Tropica. Passenger ships might dock there.
5. Not necessarily. We only know that most Blue Star ships were built before 1980. But some could be quite recent.

Recap: The question begins with “All of the cargo ships of the Blue Star Line are over”. It is a Must be True question. Learn more about LSAT MBT questions in our guide to LSAT Logical Reasoning question types.