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Deontic moods are a category of grammatical moods that are used to express deontic modality. An example for a deontic mood is the imperative ("Come!").. However, many languages (like English) have additional ways to express deontic modality, like modal verbs ("I shall help you.") and other verbs ("I hope to come soon."), as well as adverbials (hopefully) and other constructions.
Deontic logic is the field of philosophical logic that is concerned with obligation, permission, and related concepts. Alternatively, a deontic logic is a formal system that attempts to capture the essential logical features of these concepts. It can be used to formalize imperative logic, or directive modality in natural languages.
For example, in deontic logic, (If it ought to be that p, then it is permitted that p) seems appropriate, but we should probably not include that . In fact, to do so is to commit the naturalistic fallacy (i.e. to state that what is natural is also good, by saying that if p is the case, p ought to be permitted).
dynamic modality, [2] which may be distinguished from deontic modality in that, with dynamic modality, the conditioning factors are internal – the subject's own ability or willingness to act [3] The following sentences illustrate epistemic and deontic uses of the English modal verb must: epistemic: You must be starving.
(expressing deontic modality) The sentence in (1) might be spoken by someone who has decided that all of the relevant facts in a particular murder investigation point to the conclusion that Agatha was the murderer, even though it may or may not actually be the case.
In moral philosophy, deontological ethics or deontology (from Greek: δέον, 'obligation, duty' + λόγος, 'study') is the normative ethical theory that the morality of an action should be based on whether that action itself is right or wrong under a series of rules and principles, rather than based on the consequences of the action. [1]
The verb form is formally called volitive, [3] [4] but in practice, it can be seen as a broader deontic form, rather than a pure volitive form, since it is also used to express orders and commands besides wishes and desires. Examples: Venu. ― "Come." (a request or command) Donu ĝin al mi. ― "Give it to me." (a request or command) Ni faru tion.
An auxiliary verb (abbreviated aux) is a verb that adds functional or grammatical meaning to the clause in which it occurs, so as to express tense, aspect, modality, voice, emphasis, etc. Auxiliary verbs usually accompany an infinitive verb or a participle, which respectively provide the main semantic content of the clause. [1]