Rationality is the cornerstone of planning.In recent years,increasing frequency of public health crises and the powerlessness of planning in dealing with such crises have prompted us to rethink the role of planning rationality.This paper argues that both reason as a term specific in philosophy and rationality in decision science are finite,diverse,and complex,and should be understood and applied moderately.Those features also apply to planning rationality,which is based on both philosophical reasoning and decision rationality.In addition,frequent public health crises have greatly undermined the ideal thinking of optimization in a complex city and highlighted the importance of knowledge and methods,and communications and collaborations between professional and non-professional areas.Therefore,it is necessary to put the discussion of planning rationality in terms of its concept,categories,and evolution in the domain of public reason.This can be achieved through joint actions including communication and collaboration.
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