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1. If Jant walks to school every day, he will save money on fuel.
If the above statement is true, which of the following statements must also be true?
A. If Jant will not save money on fuel, then he will not walk to school every day.
B. If Jant does not walk to school every day, then he will not save money on fuel.
C. Therefore, Jant is a thrifty boy.
D. Jant needs a companion as he walks to school.
分析一下，这是典型的conditional claim的形式 If Then
If P then Q
P=walk to school everyday
Q=save money on fuel
P->Q
we know that if a conditional claim is valid, then its contrapositive is also valid
Then only NOT Q->NOT P is a valid argument.
NOT Q=not saved money on fuel
NOT P=not walk to school everyday
我们重新写一下： Organize the above to form the following:
If Jant has not saved money on fuel, then he has not walked to school every day.
所以答案应该是 A， 但是英文语义读起来有点别扭 |
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发表于 2022-3-11 13:18:31
发表于 2022-3-31 09:58:08