The classification of sciences as "soft" or "hard" primarily relates to what aspect?

Answer

The nature of the subject matter being investigated.

This classification speaks more to the nature of the subject matter—complex, context-dependent human variables versus universal physical laws—than to the quality of the thinking involved.

The classification of sciences as "soft" or "hard" primarily relates to what aspect?
classificationsoft sciencessciencesacademic fieldsdisciplines