In a world where shadows reflect an object's true essence instead of its physical form, Keiji holds up a rare magic crystal that reveals one's deepest desires in its shadow. Standing in the bright sunlight, Keiji notices that his shadow now displays a large book instead of his own figure. At that moment, Akari walks by and sees the shadow with the book. Without knowing about the crystal's properties, what does Akari believe she is observing? Provide a very brief response.
In this imaginary world, since there is no indication that people are generally aware that shadows can reflect true essences or deepest desires, Akari would likely interpret the shadow as incongruous with reality. Seeing a shadow of a book where she would expect to see Keiji's figure might be confusing. She could make a variety of guesses: it might be a trick of the light, an optical illusion, or she might think that something is blocking the sun in the shape of a book, which she cannot directly see. Akari's conclusion would depend on her own experiences and knowledge, but with no prior understanding of the crystal's properties, she would not immediately deduce that the shadow represents Keiji's deepest desire. Instead, she is likely to think she is observing some kind of unexplained anomaly or trick.