Civil Service Exam Reviewer · Logical Reasoning · medium
Consider the statement: "If it rains hard in the morning, then the flag ceremony is held indoors." Suppose it is true that the flag ceremony is not held indoors. Which conclusion necessarily follows?
- It rains hard in the morning.
- It does not rain hard in the morning.
- The flag ceremony is held indoors.
- No definite conclusion can be drawn.
Answer
B. It does not rain hard in the morning.
Solution
If it rains hard in the morning, then the flag ceremony is held indoors would follow. But the flag ceremony is not held indoors, so it cannot be that it rains hard in the morning. Therefore, it does not rain hard in the morning. (This is modus tollens.)
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