Argument from queerness
Encyclopedia
"The Argument from Queerness" is a term used in the philosophical study of ethics
Ethics
Ethics, also known as moral philosophy, is a branch of philosophy that addresses questions about morality—that is, concepts such as good and evil, right and wrong, virtue and vice, justice and crime, etc.Major branches of ethics include:...

 first developed by J. L. Mackie
J. L. Mackie
John Leslie Mackie was an Australian philosopher, originally from Sydney. He made significant contributions to the philosophy of religion, metaphysics, and the philosophy of language, and is perhaps best known for his views on meta-ethics, especially his defence of moral skepticism.He authored six...

 in his book Ethics: Inventing Right and Wrong ISBN 0-14-013558-8 (1977)

Mackie argues against the view that there can be objective ethical values
Moral objectivism
Moral objectivism may refer to:* Robust moral realism, the meta-ethical position that ethical sentences express factual propositions about robust or mind-independent features of the world, and that some such propositions are true....

, and he uses the term to describe a certain sort of reductio ad absurdum
Reductio ad absurdum
In logic, proof by contradiction is a form of proof that establishes the truth or validity of a proposition by showing that the proposition's being false would imply a contradiction...

which belief in such values implies. He states that Hence Mackie argues that this in itself is sufficient reason for doubting their existence.

The argument

In his book Morality without Foundations: A Defense of Ethical Contextualism (1999), Mark Timmons provides a reconstruction of Mackie's views in the form of the two related argument
Argument
In philosophy and logic, an argument is an attempt to persuade someone of something, or give evidence or reasons for accepting a particular conclusion.Argument may also refer to:-Mathematics and computer science:...

s. These are based on the rejection of properties, facts, and relationships that do not fit within the worldview of philosophical naturalism, the idea "that everything — including any particulars events, facts, properties, and so on — is part of the natural physical world that science investigates" (1999, p. 12). Timmons adds, "The undeniable attraction of this outlook in contemporary philosophy
Contemporary philosophy
Contemporary philosophy is the present period in the history of Western philosophy beginning at the end of the 19th century with the professionalization of the discipline and the rise of analytic and continental philosophy....

 no doubt stems from the rise of modern science and the belief that science is our best avenue for discovering the nature of reality" (1999, pp. 12-13).

The first argument is that our ordinary moral discourse purports to refer to intrinsically prescriptive properties and facts "that would somehow motivate us or provide us with reasons for action independent of our desires and aversions" — but such properties and facts do not comport with philosophical naturalism (page 50).

The second argument is that, if moral realism
Moral realism
Moral realism is the meta-ethical view which claims that:# Ethical sentences express propositions.# Some such propositions are true.# Those propositions are made true by objective features of the world, independent of subjective opinion....

 posits the existence of objective moral properties that supervene upon natural properties (such as biological or psychological properties), then the relation between the moral properties and the natural properties is metaphysically mysterious and does not comport with philosophical naturalism (p. 51).

Also, Timmons says, in connection with both of these arguments Mackie makes the point that a moral realist who countenances the existence of metaphysically queer properties, facts, and relations must also posit some special faculty by which we have knowledge of them (Timmons, p. 51).

In his 1977 book Ethics: Inventing Right and Wrong, Mackie uses these arguments to assert that most moral discourse is flawed because it presumes the existence of moral facts which aren't true. He then goes on to propose his own ethical theory, based on an effort to accommodate this deficiency. Mackie's argument from queerness has also inspired fictionalists
Fictionalism
Fictionalism is a methodological theory in philosophy that suggests that statements of a certain sort should not be taken to be literally true, but merely as a useful fiction...

 and has been cited as support for quasi-realism
Quasi-realism
Quasi-realism is the meta-ethical view which claims that:# Ethical sentences do not express propositions.# Instead, ethical sentences project emotional attitudes as though they were real properties....

.

Responses and criticisms

Christine Korsgaard
Christine Korsgaard
Christine Marion Korsgaard is an American philosopher and academic whose main scholarly interests are in moral philosophy and its history; the relation of issues in moral philosophy to issues in metaphysics, the philosophy of mind, and the theory of personal identity; the theory of personal...

(1996) responds to Mackie by saying:
Other criticisms of the argument include noting that for the very fact that such entities would have to be something fundamentally different from what we normally experience - and therefore assumably outside our sphere of experience - we cannot prima facie have reason to either doubt or affirm their existence; therefore, if one had independent grounds for supposing such things to exist (such as, for instance, a reductio ad absurdum of the contrary) then the argument from queerness cannot give you any particular reason to think otherwise.
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