Concept
Ideal observer theory
Overview
Ideal observer theory is the meta-ethical view which claims that ethical sentences express truth-apt propositions about the attitudes of a hypothetical ideal observer. In other words, ideal observer theory states that ethical judgments should be interpreted as statements about the reactions that a neutral and fully informed observer would have; "x is good" means "an ideal observer would approve of x".
The main idea [of the ideal observer theory] is that ethical terms should be defined after the pattern of the following example: "x is better than y" means "If anyone were, in respect of x and y, fully informed and vividly imaginative, impartial, in a calm frame of mind and otherwise normal, he would prefer x to y."
This makes ideal observer theory a subjectivist yet universalist form of cognitivism. Ideal observer theory stands in opposition to other forms of ethical subjectivism (e.g. moral relativism, and individualist ethical subjectivism), as well as to moral realism (which claims that moral propositions refer to objective facts, independent of anyone's attitudes or opinions), error theory (which denies that any moral propositions are true in any sense), and non-cognitivism (which denies that moral sentences express propositions at all).
Adam Smith and David Hume espoused versions of the ideal observer theory. Roderick Firth laid out a more sophisticated modern version. According to Firth, an ideal observer has the following specific characteristics: omniscience with respect to nonmoral facts, omnipercipience, disinterestedness, dispassionateness, consistency, and normalcy in all other respects. Notice that, by defining an Ideal Observer as omniscient with respect to nonmoral facts, Firth avoids circular logic that would arise from defining an ideal observer as omniscient in both nonmoral and moral facts. A complete knowledge of morality is not born of itself but is an emergent property of Firth's minimal requirements. There are also sensible restrictions to the trait of omniscience with respect to nonmoral facts. For instance, to make a moral judgment about a case of theft or murder on Earth it is not necessary to know about geological events in another solar system.
Those using the ideal observer theory do not usually assert that ideal observers actually exist. An analogous idea in law is the reasonable person criterion.
Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).
Possible passages
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Values cannot be both ideal and given, and their “given” character is emphasized, not transformed, when they are called eternal and absolute. But natural values become ideal the moment their maintenance is dependent upon the intentional activities of an empirical agent. To suppose that values are ideal because they are so eternally given is the contradiction in which objective idealism has intrenched itself…
John Dewey, The Influence of Darwin on Philosophy, and other essays in contemporary thought
States what Ideal observer theory is.
Virtue, according to Plato, might be considered as a species of science, and no man, he thought, could see clearly and demonstratively what was right and what was wrong, and not act accordingly. Passion might make us act contrary to doubtful and uncertain opinions, not to plain and evident judgments. Aristotle, on the contrary, was of opinion that no conviction of the understanding was capable of getting the better…
Adam Smith, The Essays of Adam Smith
The author is tied to Ideal observer theory in the knowledge graph.
e._ if they are only of a finite character, they are unsuitable for the self-centred universe of truth, and truth can find no adequate receptacle in thought. Such thought, which--- can produce only limited and partial categories and I proceed by their means; is what in the stricter sense of the word is termed Understanding. The finitude, further, of these categories lies in two points. Firstly, they are only…
Georg Wilhelm Friedrich Hegel, The Logic of Hegel
States what Ideal observer theory is.
Philosophers who discussed Ideal observer theory
Related ideas
- Moral nihilism
- Moral universalism
- If and only if
- Adam Smith
- Metaethics
- Non-cognitivism
- Solar System
- Cognitivism (ethics)
- Emergence
- Begging the question
- Ethical subjectivism
- Moral relativism
- David Hume
- Proposition
- Earth
- Moral realism
- Roderick Firth
Place in the tradition
Part of Metaethics.