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The paper examines the rational foundations of doubt regarding questions and their answers.
To be in a state of doubt with respect to a question is to be on the fence or divided as to which of its answers is true. What are the rational requirements for the state of being in doubt? In particular, which other questions should one be in doubt about, given the questions one is in doubt about? The paper provides answers to these questions.
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Luis Rosa (2026) studied this question.
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