The Hatter's riddle asks why a raven is like what object?

The Hatter’s riddle asks why a raven is like a writing desk.

The question appears during the Mad Hatter’s tea party in Alice’s Adventures in Wonderland. Alice tries to solve it, but the Hatter eventually admits that he has “not the slightest idea” why the two should be alike. Carroll originally intended the riddle to be answerless, making its nonsense part of the scene’s comic logic.

The riddle’s wording became famous because it sounds as though it must have a clever solution. After readers repeatedly asked for one, Carroll discussed possible answers in the preface to the 1896 edition. One popular explanation refers to Edgar Allan Poe: “because Poe wrote on both,” connecting Poe’s poem “The Raven” with writing at a desk.

That proposed explanation is not the canonical answer in the story. The enduring quiz answer is simply “writing desk,” the object named in the Hatter’s question. The Pocket watch is associated with the White Rabbit, while the tea tray belongs to the tea-party setting but not to the riddle.