Objective：This study is designed to investigate into the nature of syndrome differentiation as thinking activity. Methods：Targeted at the stream of consciousness of syndrome differentiation, a general rule was discovered with an overall point of view. Using such phenomenological Methods as reduction, synthesis, externalization, etc. , a structure analysis of intentionality was applied to discover the features and significance of intentional behaviors. Results： Syndrome differentiation was an intentional behavior of prescribed nature that inc...
