把主题拆成可研究的问题

把宽泛主题拆成一个核心问题和四到六个互不重复的子问题。每个子问题写出可以观察或测量的对象、需要的证据、可能的反例、检索关键词与结束标准。识别会影响所有结论的前提。只设计研究，不伪装成已经完成检索。

输入材料：
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目标与约束：
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只依据输入回答。缺少关键信息时明确标记未知，必要时先提问。输出应可直接用于当前任务。

Break the topic into one central question and four to six distinct subquestions. For each specify an observable subject, required evidence, possible counterexamples, search terms and a stopping criterion. Identify assumptions that affect all conclusions. Design the research without pretending searches have already been completed.

Input material:
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Goal and constraints:
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Base the response on the input. Mark missing information as unknown and ask essential questions when needed. Make the output directly usable for this task.