免责理由概括起来就是恪尽职守（due diligence）和合理调查（reasonable investigation），但针对不同的主体、不同的案情又分化出一整套细密严谨的标准，当然，这还需要通过判例的补充来完成。
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合理调查设计 rational survey design
项目组合管理准备调查 Portfolio Management Readiness Survey
合理的调查 rational study
面对这种对峙，如果他们的要求合理，你可能会调查一下具体情况，甚至可能还会提高这位员工的工资。
Faced with this confrontation, if the request is reasonable, you might investigate the situation. You might even give the employee a raise.
我指的是西方传统哲学探究，为“真理和存在，知识，或进行调查，确定合理的原则。”
I mean the western tradition of philosophical enquiry, defined as "the rational investigation of the truths and principles of being, knowledge or conduct".
国家卫生服务的患者很满意这份关照，许多人却告诉民意调查者说，英国国民卫生保险制度正在恶化，这是民意调查很不合理的怪事。
It is an irrational quirk of public opinion that while record Numbers of National Health Service patients are satisfied with their care, many tell pollsters that the NHS is deteriorating.
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