Phrasal verb
rule in
Definition
phrasal verb. to decide that something is a possible choice or explanation after thinking about it.
phrasal verb. to include something as a valid possibility or factor in an investigation or decision. Transitive and optionally separable, it is frequently used as the logical counterpart to 'rule out'.
Examples
“The investigators are trying to rule in all possible causes of the fire.”
“Although the main theory is mechanical failure, the engineers haven't ruled in human error as a factor yet.”
“The committee must rule in every viable candidate before the final interview stage to ensure a fair and comprehensive selection process.”
Examples
simple
“The investigators are trying to rule in all possible causes of the fire.”
contextual
“Although the main theory is mechanical failure, the engineers haven't ruled in human error as a factor yet.”
complex
“The committee must rule in every viable candidate before the final interview stage to ensure a fair and comprehensive selection process.”
Usage
Usually used in the context of investigations, medical diagnoses, or formal decision-making.
Teaching tip
Contrast this with 'rule out' to show how options are managed during a logical process of elimination.
Pitfall
We cannot rule in it yet.
We cannot rule it in yet.
When the object is a pronoun, it must be placed between the verb and the particle.
Phrasal verb
Particles
in
Separability
optional
Pattern
rule + in + object
Synonyms
Antonyms
Grammar
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
- Level
- B2 · Upper Intermediate
- Updated
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