code: public function isAmbiguous()
      {
          if (AddressValidation::REQUEST_OPTION_ADDRESS_CLASSIFICATION == $this->requestAction) {
              throw new \BadMethodCallException(__METHOD__.' should not be called on Address Classification only requests.');
          }
          return isset($this->response->AmbiguousAddressIndicator);
      }
docs: Tells whether or not the AmbiguousAddressIndicator is present on the XML document.
  This indicator is present when the address provided is not specific enough to
  be unique to one physical location, but provides enough
  
  @throws \BadMethodCallException
  @return bool