Explanation
Modality comprises linguistic resources that present situations in terms of possibility, necessity, obligation, ability, desire, or epistemic status. It may be expressed by modal auxiliaries, adverbs, particles, mood, intonation, and constructions. Analyses often distinguish epistemic readings concerning likelihood, deontic readings concerning permission and obligation, and dynamic readings concerning ability or internal conditions, although categories and boundaries vary. Modality does not merely modify the event described; it changes the set of accessible alternatives and the ordering source under which a proposition holds. It is not identical with evidentiality, which marks information source, though the two may interact. The concept reveals how language opens or closes spaces of thought and action between the actual, possible, desired, and required.
Movement of thought
1. A proposition first represents a situation without yet deciding whether it is actual, possible, necessary, permitted, or desired. 2. A modal expression introduces a standard such as knowledge, rules, abilities, goals, or circumstances and orders alternatives accordingly. 3. Addressees infer from form and context which reading applies and whose knowledge, duty, or possibility supplies the point of reference. 4. A counter-test varies source and standard and separates modality from tense, negation, evidentiality, politeness alone, and general speaker attitude. 5. The situation returns as a weighted possibility: it appears not only described but as reachable, uncertain, required, or excluded.
Scientific use case
Semantics, pragmatics, and typology examine modal expressions, scope, and readings through corpora, judgments, and cross-linguistic comparison. Experiments test contextual shifts between epistemic and deontic interpretation.
Example
“The door must be open” may express an epistemic inference from visible light or a deontic instruction; context determines the relevant space of alternatives.
Counterexample
The sentence “It rained yesterday” locates an event in the past but by itself evaluates neither possibility nor necessity. Tense alone is not modality.
Distinction
Distinguish it from mood as a grammatical category, evidentiality as source marking, tense, aspect, negation, illocution, politeness, and evaluation, even when their forms interact.
Effect on thought and perception
Modality grades validity and pressure to act, orders alternative worlds by knowledge or norms, and lets one proposition appear as possibility, duty, or ability.
Resonance
Possible courses open around a sentence; a modal expression stretches them according to knowledge, rule, or desire and brings some closer while making others unreachable.
Cite this entry
Reich, Michael (Hrsg./ed.): „Modality“. Atlas der Sprache, AT-091-055. ATLAS 260, data model 1.6.0. https://atlasoflanguage.com/concept/AT-091-055The address remains stable; editorial content may evolve. Editorial reading state: 2026-10-15. Include your access date for precise references.
Historical background
Mill’s discussion of modality exposes an older classificatory landscape. He considers temporal differences alongside other modifications of propositions, then treats formulations such as may be dead as assertions about the speaker’s uncertainty rather than simply as further properties of the person described. This moves the analysis away from a list of events towards the relation between an assertion and the grounds on which it is entertained. It is not, however, a complete account of what contemporary linguistics groups under modality. Possibility, necessity, permission, obligation and ability cannot all be reduced without argument to not knowing whether a proposition is true. The Atlas’s wider definition must therefore remain distinguishable from the selected historical passage. An original contrast illustrates the boundary: the machine may have stopped can express an uncertain assessment, whereas visitors may enter can grant permission. The word form alone does not fix the relevant interpretation. The inspected eighth-edition text documents a particular English philosophical treatment, not the first occurrence of modality. A fuller history must follow the separation and interaction of logical, epistemic and other linguistic uses rather than project today’s taxonomy unchanged into Mill.
How conceptual history changes the analysis
Mill witnesses an epistemic part of modality; the modern field requires separate tests for epistemic, deontic, and dynamic readings.
References for the historical section
- John Stuart Mill, A System of Logic, Ratiocinative and Inductive, eighth edition, New York: Harper & Brothers, 1882; Project Gutenberg ebook 27942 · Book I, Chapter IV, §2: modifications of predication and epistemic uncertainty
Selected named passages read in the transcription. The title page identifies an 1882 printing of the eighth edition, not the first edition. No claim that these passages were present unchanged in the first edition; no first-attestation or exhaustive reception claim.