If you ask the right questions – questions that continually split the list of all possible people in half – you can uniquely identify any human on Earth in just 33 questions.
The questions therefore should be vague (that is, applies to about half of everyone) so that you eliminate as many possibilities in one question as possible, no matter what the answer is. If it’s too specific, the chance of the answer being “yes” is much smaller, and to worsen the matter, if the answer is “no”, then you only eliminated a small number of people with your question.
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