CATDOLL: I'm curious! "Hyouka" appears in the Japanese university independent admissions exam questions

Most of the university admissions in Japan are independent. Although there are schools that look at graduation exam results, they are generally not the main criteria for judging. Since it is an independent admission, the examination methods and contents are varied. Some have written tests and some are pure interviews. Some professional questions are difficult and some are very strange. Today I will introduce to you such a strange question. In fact, it can’t be said to be strange. It can only be said that the questioner is "well-informed", or the literary value of some light novels has been affirmed-"Hyouka" by Honobu Yonezawa was used as a university entrance examination question on the examinee's test paper.

Vertical, read from right to left. In the upper right corner, you can see that this is a letter to Oreki Houtarou.

Please explain the deeper meaning of the underlined sentence in the context (laugh)