Three-Question Rule for the Oracle Duck

The Three-Question Rule for the Oracle Duck governs access to a prophetic animal whose answers can be obtained only three times by each questioner, in one sitting, and only in yes-or-no form. When Myfanwy tests the duck, the limit makes every question consequential: she uses the final one to learn that her memory will be lost within a month, transforming a laboratory demonstration into a personal warning and a practical deadline.

The Rule and Its Procedure

Dr. Crisp explains the arrangement to Myfanwy as a strict, fairy-tale-like condition: each person gets three questions ever, the questions must be asked in one sitting, and the duck answers yes or no. The rule is not merely a limit on the amount of information available; it forces the questioner to choose what matters most before any answer is known. Once a question has been spent, there is no opportunity to revisit it later.

The duck communicates through a laptop fitted with an oversize keyboard, which the laboratory staff had adapted because of the mismatch between its beak and ordinary keys. Its response is therefore legible on a monitor rather than delivered in speech. Before Myfanwy questions it, the staff pause their tests and grooming, and she meets the animal alone in a soundproof white room. The unusual apparatus and controlled setting make the rule part of an organized test, while the strict three-question limit gives that test the character of a scarce consultation.

Myfanwy’s Three Questions

Myfanwy first asks whether operatives of the Checquy will attack her. The duck straightens its neck and pecks the Y key, displaying an affirmative answer. This prediction is not wholly new to her: other figures have already foretold an attack. The duck’s quick, unambiguous response nevertheless confirms that it can answer through the computer, and leaves Myfanwy to decide how best to use the two questions still available.

Her second question narrows the danger to a particular place: she asks whether she will be attacked in her house. The duck answers N. Myfanwy feels relief, having imagined being dragged from sleep or watching her rabbit killed in front of her. The answer gives her a limited assurance about the setting of the predicted attack, but it does not cancel the first prediction or identify where an attack will occur.

For her third and final question, Myfanwy asks whether she will lose her memory within a month. The duck answers Y. The limit makes this answer irrevocable: there is no fourth question with which to clarify what the loss will involve or how she might prevent it. Myfanwy covers her face and begins recalculating her schedule, realizing that she has weeks at most and had wrongly assumed she would have time to prepare.

Consequences and Significance

The episode demonstrates both the rule’s operational clarity and its emotional force. The duck gives a prompt answer to each of the questions recorded in the scene, but the three-question structure leaves Myfanwy to allocate a finite resource between immediate danger, its possible location, and the approaching loss of her memory. Each answer changes the value of the next choice: reassurance about her house does not remove the threat, while the final prediction reshapes the time she believes remains to act.

The encounter also distinguishes prediction from explanation. The duck can confirm that an attack is coming and that memory loss is imminent, but the yes-or-no format supplies neither causes nor solutions. The rule thus turns prophecy into constrained information rather than a complete account of the future. Myfanwy leaves with an answer that is more urgent than useful in itself: she must now plan under a deadline she had not known, with no questions left to ask.