Logical Reasoning
PrepTest 152 Section 2
Find the question you’re working on. Explore the reasoning, understand each answer, and learn from your mistakes.
Choose a question
Explanations for every question, find them by number or text.
- Q1:
Student: My university recently enacted new penalties…Flawed Reasoning
The new efforts won't succeed.
- Q2:
- Q3:
Requiring that passwords conform to rules of length…Sufficient Assumption
Password rules make it more likely that someone will get into a user's account. (Rule examples: length, complexity, unpredictability)
- Q4:
In view of the considerable length of the police chief's…Principle – Justify
We should hold the chief responsible for the corruption at his department, even if he wasn't personally involved.
- Q5:
A store was vandalized repeatedly over a six-month period…Weaken
The friend concluded that there was bright lighting installed around the store.
- Q6:
Researchers studying athletes found that those who played…Most Strongly Supported
Athletes who play for love of their sport had better vision than those who just wanted to win a trophy or competition.
- Q7:
Economist: ChesChem, a chemical manufacturer located…Necessary Assumption
If natural gas prices go up in Chester even a tiny amount, ChesChem will move to Tilsen.
- Q8:
When researchers discovered that cuttlefish have the ability…Paradox
It turns out cuttlefish don't use "startle displays" to scare off predators.
- Q9:
- Q10:
Godinez: In the past, land was sometimes measured by…Identify the Conclusion
As land use moved beyond farming, we needed new ways to measure land that didn't depend on plowing difficulty.
- Q11:
Last year the Lalolah River was ranked by the Sunvale Water…Flawed Reasoning
Sunvale must have cleaned up the Lalolah river.
- Q12:
If an activity significantly reduces chronic lower back pain…Necessary Assumption
Doctors should be ready to discuss yoga's use in treating back pain.
- Q13:
Shelton: The recent sharp decline in the number of moose…Paradox
Shelton says that the moose population in region A declined because there were more white tailed deer.
- Q14:
Until fairly recently, classroom computers were considered…Principle – Conform
Classroom computers used to be a luxury.
- Q15:
A scientific team compared gold samples from several ancient…Weaken
Probably the gold in the artifacts was mined from the ancient mine.
- Q16:
Most pet owners who take allergy medication are allergic…Flawed Parallel Reasoning
If Chuck gets a pet allergy he will probably take allergy medication.
**Diagram:** Pet allergy (most)➞ take allergy medication
**Note:** On the LSAT, words such as "likely" and "probably" mean the same thing as "most", so this argument's conclusion is a "most" statement.
- Q17:
Scientist: A number of errors can plague a data-collection…Paradox
Researchers correct errors in data.
- Q18:
Doctor: Angiotensinogen is a protein in human blood…Flawed Reasoning
Disease X surely causes high blood pressure.
- Q19:
Some species of tarantula make good pets…Parallel Reasoning
Not every tarantula species has poison fangs.
- Q20:
Pulford: Scientists who study the remains of ancient…Method of Reasoning
- Q21:
Ethicist: It is morally right to reveal a secret only if…Principle – Parallel
- Q22:
Although human economic exchange predates historical…Flawed Reasoning
Barter was the original system and came before currency.
- Q23:
A scientific study provides evidence that crows are capable…Necessary Assumption
A study suggests crows may be able to recognize threatening humans and tell other crows about them.
- Q24:
Political scientist: When a bill comes before a legislative body…Must be False
Most of the time, a bill can get a majority of votes in a legislature.
- Q25:
The more demand there is for something, the easier it is…Necessary Assumption
Used cars less than ten yers old tend to be easier t0 sell than cars which are older than ten years old.
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