title_body: Should every paragraph tag have a CSS style (InDesign)?
upvoted_answer: There is no need to give every paragraph a class, the definition at 1.  will apply to every paragraph, with or without a tag, and only on paragraphs that are directly below a footnote the settings will be overruled by those of the CSS of 2.
  
  You might not even need to have the CSS at 1., but for the defaults of the ePub reader.