Practice Lsat: Quiz

(A) All students who study daily get good grades. Marta gets good grades. Therefore, Marta studies daily. (B) All mammals have hair. A whale has hair. Therefore, a whale is a mammal. (C) No reptiles are warm-blooded. This animal is warm-blooded. Therefore, this animal is not a reptile. (D) All birds can fly. Penguins cannot fly. Therefore, penguins are not birds. (E) All squares have four sides. This figure has four sides. Therefore, this figure is a square. Researcher: “People who sleep fewer than six hours per night are more likely to catch a common cold than those who sleep eight hours or more. Therefore, to reduce your risk of catching a cold, you should sleep at least eight hours each night.”

Which one of the following, if true, most weakens the researcher’s argument? practice lsat quiz

(A) Some people naturally need only five hours of sleep and never catch colds. (B) Stress causes both reduced sleep and a weakened immune system. (C) Many people who sleep eight hours still catch colds every year. (D) Sleeping more than nine hours per night has been linked to other health problems. (E) The common cold is caused by a virus, not by lack of sleep directly. The city’s new recycling program collected 50% more plastic last month than the old program collected in its final month. Therefore, the new program is more effective at recycling plastic than the old program was. (A) All students who study daily get good grades

The editorial’s argument is most vulnerable to criticism because it (B) All mammals have hair

Directions: Select the best answer for each question. 1. Paleontologist: “All dinosaurs that ate only plants had flat teeth. This dinosaur had sharp, serrated teeth. Therefore, this dinosaur did not eat only plants.”