LSAT 106 | Section 1 | Logical Reasoning: Q21

LR Question 21 Explanation

QUESTION TEXT: Psychologist: Some astrologers claim that our…

QUESTION TYPE: Necessary Assumption

CONCLUSION: Our horoscopes don’t completely determine our personalities.

REASONING: The psychologist found two people who weren’t twins and were born on the same day in different cities. Personality tests have shown they have different personalities.

ANALYSIS: The psychologist has shown that the two people were born on the same day. But do they have the same horoscopes?

Apart from birth dates, I don’t know if there are other factors that determine horoscopes. The psychologist is assuming that no other factors exist.

___________

1. The psychologist doesn’t care whether astrologers have experimented. Whatever they’ve done, he thinks his experiment proves them wrong.
2. Horoscopes aren’t supposed to differ based on cultural differences. The astrological claim is very clear: anyone with the same horoscope will have the same personality, (no matter their culture).
3. CORRECT. If the two individuals had different horoscopes, then it’s not surprising they had different personalities (according to astrological theory).
4. The birth records are only important because they showed the two people were born on the same day. We don’t need hospital records to be complete for all other people.
5. This offers a non-astrological reason why twins have similar personalities. But this assumption isn’t necessary, as long as there is another non-astrological reason why twins are similar.