LSAT 63, Logical Reasoning I, Q6, LSATHacks

LR Question 6 Explanation, by LSATHacks

QUESTION TEXT: Small experimental vacuum tubes can operate in heat…

QUESTION TYPE: Must Be True

FACTS:

1. Small experimental vacuum tubes can operate in high heat that would cause semi-conductors to fail.
2. It would be nice if (for digital circuits) we could have a component that does everything a semi-conductor does but that also resists heat better.
3. Vacuum tubes don’t have the same current capacity as semi-conductors.

ANALYSIS: This supports the idea that vacuum tubes can’t replace semi-conductors in digital circuitry. They lack the necessary current capacity.

___________

1. CORRECT. Their heat resistance is nice, but any semi-conductor replacement would have to do other things too, like have a good current capacity.
2. Hard to say. Vacuum tubes might have some other massive flaw compared to semi-conductors.
3. This is basically the same answer choice as B, worded differently. There could be some other huge problem with vacuum tubes. Maybe they don’t do anything that semi-conductors can do, apart from resisting heat.
4. We have no clue. We don’t even know what vacuum tubes and semiconductors do. Maybe semi-conductors are terrible for most things that aren’t digital circuitry.
5. We have no idea. The stimulus didn’t tell us anything else about what vacuum tubes can and can’t do.

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