Explanation
Lexical entailment arises when the conventional meaning of an expression semantically carries another proposition. From “Nora whispers,” for example, it follows that Nora speaks; the relation rests on the lexical structure of whisper rather than on a special conversational situation. Such inferences may be supported by hyponymy, feature inclusion, or other sense relations, but they must be distinguished from presupposition, implicature, and merely probable world knowledge. The conceptual movement decomposes the source meaning, identifies the included component, and uses negation and possible countermodels to test whether the inference is genuinely necessary.
Movement of thought
1. A source utterance is analysed for the conventional meaning components of its central lexical item. 2. An included superordinate category or necessary feature is formulated explicitly as a candidate conclusion. 3. Analysis tests whether every literal true use of the source sentence also makes the target sentence true. 4. A counter-test searches for contexts where only world knowledge or pragmatic expectation supports the inference. 5. The surviving relation is described as lexically licensed entailment rather than free association.
Scientific use case
Lexical semantics, formal semantics, and natural-language-inference research use controlled sentence pairs to test entailments. Annotation must record sense, negation, quantification, and the distinction between necessity and plausibility.
Example
From “The falcon killed the mouse” it follows lexically that the mouse died. That the falcon subsequently ate is only a plausible expectation from world knowledge, not a necessary semantic consequence.
Counterexample
From “Nora bought bread” it may be likely that she intended to pay, but successful payment is not a necessary consequence of the word meaning. An easily conceivable counterexample defeats the proposed lexical entailment.
Distinction
Distinguish lexical entailment from conversational implicature, presupposition, causal world knowledge, and statistical plausibility. It must follow from conventional meaning under a specified reading.
Effect on thought and perception
Lexical entailments condense knowledge within words and support efficient comprehension. Confusing them with expectations produces fallacious arguments and erroneous automated inferences.
Resonance
A word carries more than its surface separately lists. A second proposition lies within its meaning and becomes audible in understanding as a necessary aftertone.
Cite this entry
Reich, Michael (Hrsg./ed.): „Lexical inference“. Atlas der Sprache, AT-119-020. ATLAS 260, data model 1.6.0. https://atlasoflanguage.com/concept/AT-119-020The address remains stable; editorial content may evolve. Editorial reading state: 2026-10-15. Include your access date for precise references.
Historical background
In II.i.2 Mill considers apparent inferences whose content is already included in the predicate of the initial statement. On his analysis, moving from Socrates is a man to Socrates is a living creature yields no new knowledge. He nevertheless values recognizing the same assertion under different formulations. This is historical context for lexical inference, not evidence that Mill coined the modern label.
How conceptual history changes the analysis
Unpacking meaning and extending knowledge are different achievements of an inference.
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 II, Chapter I, §2: consequences already connoted by a predicate
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.