Call the primary validator for a quick test

def _is_valid_amendment_json(self, json_repr):
        """Call the primary validator for a quick test"""
        amendment = self._coerce_json_to_amendment(json_repr)
        if amendment is None:
            # invalid JSON, definitely broken
            return False
        aa = validate_amendment(amendment)
        errors = aa[0]
        for e in errors:
            _LOG.debug('> invalid JSON: {m}'.format(m=e.encode('utf-8')))
        if len(errors) > 0:
            return False
        return True