The argument from queerness

J. L. Mackie’s argument from queerness is a key argument against moral realism and objectivism, but it is also a central argument for constructing Mackie’s own position which he calls error theory. Unfortunately, Mackie does not present the argument from queerness in a fully systematic and explicit way in his original text. For that reason, it is necessary to reconstruct the argument in a manner that possesses these qualities. I will reconstruct three versions of the argument from queerness and criticize them. In this way, I will arrive at the strongest version of the argument from queerness. Only the „normative-motivational essences” version possesses the qualities that genuinely threaten realism and objectivism.