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LSAT-Section-1-Logical-Reasoning – Section One : Logical Reasoning

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Showing 385–387 of 430 questions

Question 385

If relativity theory is correct, no object can travel forward in time at a speed greater than the speed of light. Yet quantum mechanics predicts that the tachyon, a hypothetical subatomic particle, travels faster than light. Thus, if relativity theory is correct, either quantum mechanics' prediction about tachyons is erroneous or tachyons travel backward in time.

The pattern of reasoning in which one of the following arguments is most similar to that in the argument above

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    According to a magazine article, the view that present-day English is a descendant of the ancient Proto-Indo-European language is incorrect. Rather, English more likely descended from a Finno-Ugric language, judging from the similarities between English and other languages of Finno-Ugric descent.
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    If the defendant committed the crime, then either the defendant had a motive or the defendant is irrational, for only irrational persons act with no motive. If the psychologist is correct, then the defendant is not rational; on the other hand, according to the evidence, the defendant had a strong motive. Thus, since there is no reason to disbelieve the evidence, the defendant is guilty.
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    The human brain can survive without oxygen only for a few minutes, according to modern medicine. Surprisingly, a reliable witness reported that a shaman has survived for an entire week buried five feet underground. Thus, if modern medicine is not wrong, either the witness is mistaken or the shaman's brain did not suffer any lack of oxygen.
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    Alexander the Great was buried either in Alexandria or in Siwa, Egypt. However, the burial place is more likely to be Siwa. A limestone table engraved by Ptolemy, Alexander's lieutenant, was found in Siwa, attesting to Alexander's burial place.
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    If the big bang theory is correct, the universe is currently expanding: the galaxies are moving away from each other and from the center of an original explosion. The same theory also predicts that, eventually, the gravitational forces among galaxies will counterbalance the galaxies' kinetic energy. It follows that, at some point, the universe will stop expanding.
Question 386

Maria won this year's local sailboat race by beating Sue, the winner in each of the four previous years. We can conclude from this that Maria trained hard.

The conclusion follows logically if which one of the following is assumed?

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    Sue did not train as hard as Maria trained.
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    If Maria trained hard, she would win the sailboat race.
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    Maria could beat a four-time winner only if she trained hard.
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    If Sue trained hard, she would win the sailboat race.
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    Sue is usually a faster sailboat racer than Maria.
Question 387

Dietician: "The French Paradox" refers to the unusual concurrence in the population of France of a low incidence of heart disease and a diet high in fat. The most likely explanation is that the French consume a high quantity of red wine, which mitigates the ill effects of the fat they eat. So North Americans, with nearly the highest rate of heart disease in the world, should take a cue from the French: if you want to be healthier without cutting fat intake, drink more red wine.

Which one of the following statements, if true, most seriously undermines the conclusion of the dietician's argument?

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    French men consume as much red wine as French women do, yet French men have a higher rate of heart disease than do French women.
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    A greater intake of red wine among North Americans would likely lead to a higher incidence of liver problems and other illnesses.
    is true, then North Americans are certainly not going to get healthier, as the conclusion states, on a heavy red wine regimen.
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    Not all French people have a diet that includes large amounts of fat and a high quantity of red wine.
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    All evidence suggests that the healthiest way to decrease the chance of heart disease is to exercise and keep a diet low in fat.
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    Many other regions have much lower rates of heart disease than France, though their populations consume even less red wine than do North Americans.