Difficulty: Medium

Average Score: 65%

Which of the following statements best exemplifies the use of sound reasoning?

Rationale

Since salamanders are amphibians and all amphibians are cold-blooded, salamanders are cold-blooded.

This statement illustrates sound reasoning as it follows a logical deduction based on established classifications. It uses the fact that all amphibians share the characteristic of being cold-blooded to conclude that salamanders, being amphibians, must also possess this trait.

A (Since ocean temperature in the summer is usually 75 degrees, the water will be about 75 degrees when we go to the beach this summer.) YOUR ANSWER

This statement lacks sound reasoning because it relies on a generalization about ocean temperatures without considering potential variations. Factors such as weather conditions, tides, and local geography could lead to different temperatures, making it an unreliable conclusion.

B (Since every child I babysit likes to play with blocks, all children must like playing with blocks.) YOUR ANSWER

This statement exemplifies hasty generalization, a logical fallacy where a conclusion is drawn based on insufficient evidence. The personal experience of babysitting a few children does not provide a comprehensive view of all children, leading to an inaccurate conclusion about a broader population.

C (Since John and Dane are on the track team together, both must also be good sprinters.) YOUR ANSWER

This reasoning is flawed as it assumes that membership in the same team guarantees the skill level of all members. While it might be true that many members are good sprinters, this is not a definitive conclusion, as individuals may have varying levels of ability.

Conclusion

Sound reasoning is characterized by logical deductions based on universal principles or classifications. The statement about salamanders effectively demonstrates this by applying a general truth about amphibians to a specific case. In contrast, the other choices reflect flawed reasoning through generalizations or assumptions that lack sufficient evidence, emphasizing the importance of critical thinking in drawing conclusions.

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