code: def inform_if_paths_invalid(egrc_path, examples_dir, custom_dir, debug=True):
      
      if (not debug):
          return
  
      if (egrc_path):
          _inform_if_path_does_not_exist(egrc_path)
  
      if (examples_dir):
          _inform_if_path_does_not_exist(examples_dir)
  
      if (custom_dir):
          _inform_if_path_does_not_exist(custom_dir)
docs: If egrc_path, examples_dir, or custom_dir is truthy and debug is True,
      informs the user that a path is not set.
  
      This should be used to verify input arguments from the command line.