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Maccies Error Theory, For example:, Mackie agrees with cognitivists that…

- - - - Mackie argues you cannot simplu derive objective moral duties from facts.
- - - - Some cultures allow arranged marrgiag
      - Different views on ethanasia
      - Some societies accepted slavery
    - - Evaluation against Mackie
        
        Realists argue disagreement does not prove no truth exists.
        
        People disagree about science too, yet scientific facts still exist.
- - - - If objective values existed, they would be very unusual entities. A moral property like "wrongness" would need to somehow exist independantly and posses built-in authority that tells us what we ought to do
      - Mackie asks: how could a property automatically demand action? Physical objects do not work like this,
    - - If objective moral values existed, we would need a strange way of detecting them. How would humans perceive objects goodness or wrongness? We cannot see, smell, or measure moral properties.