FILE No.143Unsolved
Monday. Kohei, a sixth-grader, forgot to write his homework diary and wrote it in the classroom early in the morning. Today was a clear, sunny day.
Since Kohei could not remember yesterday, having played games the whole time, he wrote a lie. "Yesterday I went to my little brother's soccer practice. At the outdoor field he was so good that I was amazed. Then I went home for lunch. I studied for an hour, bought clothes and shoes at the department store, and had dinner too."
A classmate who came in looked at the diary and immediately said, "That's a lie." Yesterday was a day with a heavy rain warning in effect from morning to night, and the outdoor field of his brother's club was flooded and closed all day, with word out that "practice is canceled for the whole day." The classmate knows this.
Why was the lie exposed?
If you get stuck, open the hints one at a time, in order.
Was the field usable yesterday?
Did the practice take place?
What did the classmate know?
Why was the lie exposed?
Choose the answer closest to the truth.
Because yesterday that field was closed and his brother's practice was canceled
The answer is "Because yesterday that field was closed and his brother's practice was canceled."
The diary says he watched his brother's practice on the outdoor field. But yesterday, because of the heavy rain, that field was flooded and closed all day, and practice was announced as canceled all day. The classmate knew this.
Department stores are open on Sundays, and the classmate has no way of knowing how long Kohei studied or whether his brother has lessons.
Because you spend time doubting the details of the diary.
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