Deliberate Vagueness
Definition
Intentional use of imprecise language to leave interpretive flexibility or to allow political compromise. Terms like 'reasonable', 'material', 'promptly', and 'substantial' are vague by design; they shift the interpretive burden to judges and fact-finders rather than encoding a rigid rule.
- Purpose
- Interpretive flexibility, political compromise
- Example terms
- Reasonable, material, promptly, substantial
- Effect
- Shifts interpretive burden to judges and fact-finders
Common questions
Why would lawmakers choose vague wording instead of a precise rule?+
Vague terms let legislators reach agreement despite disagreeing on details, and they let a single provision adapt to circumstances the drafters could not fully anticipate, at the cost of predictability.
How does deliberate vagueness affect forensic expert testimony?+
An expert is often asked to help a fact-finder decide whether evidence meets a vague legal standard, such as whether a finding is 'reasonably certain', so the expert's role shifts from stating a fact to helping apply an open-textured term.
Related terms
- Archaism
- Words and phrases that were standard in earlier English but have since fallen out of common use: 'hereinafter', 'aforesaid', 'witnesseth', 'whereas'. They...
- Idiolect
- The language variety specific to an individual, comprising their characteristic vocabulary, syntactic preferences, spelling habits, punctuation patterns, and discourse-level style. Authorship attribution...
- Nominalisation
- The conversion of a verb or adjective into a noun form (e.g. 'make a determination' instead of 'determine'; 'give consideration to' instead...
- Passive Voice
- A syntactic construction in which the grammatical subject receives the action rather than performs it ('a notice shall be given' rather than...
- Plain Language
- Writing that the intended reader can understand on first reading, without special training. Plain-language guidelines favour short sentences, active voice, everyday vocabulary,...