Moral Error Theory is a philosophical view that suggests all moral statements are false because they refer to non-existent properties. According to this theory, when people make moral claims, they are making errors because there are no objective moral facts to support these claims. This perspective challenges the idea that moral judgments can be true or false in any meaningful way. Proponents of Moral Error Theory argue that moral language and beliefs are based on subjective feelings rather than objective truths. This theory is often associated with philosophers like J.L. Mackie, who emphasized that moral values do not exist independently of human attitudes and emotions.