  The last point is important. The most straightforward way to respond to an overgeneralization objection is to insist that there are after all crucial differences between the disagreement that occurs in ethics and that which occur in the other areas. This is what Mackie did by suggesting that scientific disagreements, unlike moral ones, result from speculative inferences or inadequate evidence. Whether the disagreements are different in such ways is an empirical issue which is hard to resolve. However, the fact that any argument from moral disagreement involves further premises besides that which posits disagreement leaves their advocates with other options when trying to challenge the relevant parity claim. That is, it potentially allows them to concede that there is “just as much” or “just as deep” disagreement in ethics and the other areas and still consistently argue that the disagreement that occurs in those areas license different conclusions about their status.