True, but given that it's more difficult to change your weight than it is to find someone of a different weight, I'd rather live my whole life with a scale that

True, but given that it's more difficult to change your weight than it is to find someone of a different weight, I'd rather live my whole life with a scale that might be reading (say) 5lbs high or low, rather than a scale that fluctuates between 5lbs high or low from measurement to measurement.