QUESTION TEXT: All bridges built from 1950 to 1960…
QUESTION TYPE: Must Be True
FACTS:
- Every bridge built during 1950-60 needs serious rehabilitation.
- Some of these bridges had faulty designs, too.
- No suspension bridges had faulty design.
- So some bridges that need rehabilitation aren’t suspension bridges.
ANALYSIS: We can conclude that some bridges with faulty design need serious rehabilitation. (It’s a combination of facts 1 and 2.)
The suspension bridges are just there to confuse you.
___________
- Even if a suspension bridge was built in 1981, it might need rehabilitation. Maybe every suspension bridge worldwide needs serious rehabilitation. We know every bridge built between 1950-60 needs rehabilitation, but we don’t know that other bridges don’t also need rehabilitation.
- This is the opposite of A. Maybe no suspension bridge was built between 1950-60, and every suspension bridge worldwide is in perfect condition. We’re not told much about suspension bridges.
- CORRECT. Some bridges build between 1950-60 have faulty design, and every bridge built between 1950-60 needs serious rehabilitation.
(Including those with faulty design.) - The first sentence directly contradicts this answer choice.
- This is false. We know that some bridges built between 1950-60 have faulty design, and that none of those bridges are suspension bridges. Logically then, those bridges with faulty design must be non-suspension bridges.
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