Diet Company Executive: Our “12-Weeks-to-Skinny” diet plan is the best in the country. Each year we send out a comprehensive survey to everyone who enrolled in this plan. The survey contains questions about everything from the quality of food in the program to the percentage of weight lost during the 12 weeks. Amazingly, last year over 80% of the survey respondents lost more than 10% of their body weight during the 12-week period, a figure unprecedented among diet companies.

The executive’s claim about the quality of the diet plan is most vulnerable to criticism on which of the following grounds?

Recent research shows that training programs that include emphases on flexibility, highlighting activities such as yoga and pilates, are significantly more effective at preventing injury in athletes than are training programs that solely focus on strength and speed. The Bournemouth Football Club suffered fewer injuries than the Haleford Football Club this past season, so it can be concluded that Bournemouth's training program featured more flexibility activities than did the program at Haleford.

The argument is most vulnerable to criticism because it:

Town Representative: The new advertisements protesting plans by the town to build a new pier for large cruise ships have been appearing daily. The advertisements claim that the new pier will bring in more cruise ships and ruin the quaint charm of the town. However, these claims can be dismissed. Most of these advertisements were paid for by a major developer who currently profits greatly from allowing cruise ships to offload passengers at his property when they anchor in the nearby bay.

Which of the following most accurately describes a flaw in the town representative’s argument?

Genetically-altered trees have been developed that can remove toxins from the air more quickly than naturally-occurring trees can. However, we will not know whether the modified trees adversely affect the environment without actually planting them and carefully monitoring the environment for at least several years. Since this might cause irrevocable harm to the surrounding area, we should resist the temptation to use these trees until long-term research in a closed environment has been completed.

Which of the following best describes the method of argument used in the argument above?

Incumbent candidate for governor: As the people of our great state know, my administration has created unprecedented economic prosperity and job growth. Just look at the unemployment rate, which has reached its lowest point in nearly twenty years!

Opposing candidate for governor: That’s preposterous. You overlook the fact that the unemployment rate is just as much a function of the number of people in the labor market as it is of the number of people employed. Your greatest contribution to the economy has been a series of retirement parties and moves to other states!

The opposing candidate’s reply to the incumbent proceeds by:

University X has announced that its library will not be open during the summer. Students attending classes during the summer have protested, saying that the library has research materials that cannot be borrowed from any public library in the area. The university administration has responded with an announcement that all university library materials will be accessible online through computers that are provided to all students for free by the university.

Which of the following best describes a method of argument used by the university administration?

Hiker: With the storm approaching quickly we need to make a decision on how to proceed. We can try to descend the mountain to seek shelter, but then we will undo our progress and lose our chance to reach the summit – and we may not make it all the way down, anyway. We can continue on our current course and hope that the storm misses us or passes quickly, but doing so risks a true disaster. So we should bivouac here, using the time before the storm to set up a safe, secure camp to weather the elements.

The hiker’s argument does which of the following?