This kind of argument happens when one speaks of type and one speaks of function. To say that the dog is not a breed because it is not true to a particular type is incorrect - what is type anyway? Who establishes it and how do you know it? Is type just a variation in the breed or an entirely different breed? In most cases it is only the appearance of the dog - which works great for the shows but not for a working dog. So - it is almost impossible to get agreement if one talks type and one talks function. The basis for conclusion are mutually exclusive.