docs: def check(self, s, instant_exact=True):
          """Check if a string is in the DB.
  
          :param s: str, string to check against the DB.
          :param instant_exact: bool, look up exact matches with a hash lookup.
          :return: True or False
          :rtype: bool
  
          """
          all_sets = self._get_comparison_strings(s)
          if instant_exact and s in all_sets:  # exact match
              return True
  
          for comparison_string in all_sets:
              if self.comparison_func(s, comparison_string) >= self.cutoff:
                  return True
          return False