Statement Bias

In short, it is a phenomenon of remembering interrogative sentences as declarative sentences.

This phenomenon often becomes the cause of hearsay and rumors: the brain remembers "Could it be ○○?" as "They say it's ○○!" and it spreads as a rumor. Conversely, it can also be used to elicit a certain reaction—Smart Psychology Usage cites "Is this the best book you've ever read?" (...) as an example.