conjecture
C1Formal, academic
Definition
Meaning
An opinion or conclusion formed on the basis of incomplete information; a guess.
In mathematics and philosophy, a proposition that appears to be true but has not been proven or disproven; speculative reasoning.
Linguistics
Semantic Notes
Often implies a degree of uncertainty or educated guesswork. It sits between a wild guess and a hypothesis, suggesting some reasoning is involved but evidence is insufficient.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or meaning differences. Both regions use the word identically.
Connotations
Slightly more common in British academic writing, but the difference is marginal.
Frequency
Low-frequency word in both dialects, used primarily in formal, academic, or technical contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
It is [adjective] to conjecture that...to conjecture about/on somethingto conjecture + wh-clause (e.g., what, how, why)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “A matter of conjecture”
- “Beyond conjecture”
Usage
Context Usage
Business
Rare; may appear in risk assessment: 'Our market forecast is largely conjecture at this stage.'
Academic
Common in philosophy, history, and sciences to denote unproven ideas: 'The paper critiques the author's initial conjecture.'
Everyday
Very rare; replaced by 'guess' or 'speculation'.
Technical
Used in mathematics for famous unproven statements: 'Goldbach's Conjecture.'
Examples
By Part of Speech
verb
British English
- One can only conjecture about the author's true intentions.
- I wouldn't like to conjecture on the election outcome.
American English
- Researchers can only conjecture how the ancient tool was used.
- It's pointless to conjecture without more data.
adverb
British English
- She spoke conjecturally about the potential merger.
American English
- He answered conjecturally, without firm evidence.
adjective
British English
- This is a highly conjectural assessment of the economic climate.
American English
- His timeline for the project is entirely conjectural.
Examples
By CEFR Level
- His idea was just a conjecture, not a fact.
- We don't know the answer; it's all conjecture.
- The article was based more on conjecture than on solid evidence.
- It is mere conjecture to suggest she will resign.
- The historian's reconstruction of events remains plausible but ultimately conjectural.
- Mathematicians have spent decades trying to prove the famous conjecture.
Learning
Memory Aids
Mnemonic
Think: CONnect + JECTure (like 'inject') → You CONnect ideas and 'inJECT' your opinion when information is incomplete.
Conceptual Metaphor
BUILDING/WEAVING (constructing an idea from thin threads of evidence).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating as 'конъектура' (a false friend meaning a conjectural emendation of a text). The closer translations are 'предположение', 'догадка', or 'гипотеза' (for a scientific conjecture).
Common Mistakes
- Using it as a countable noun incorrectly (e.g., 'a conjecture' is fine, but 'many conjectures' sounds odd; 'much conjecture' is better). Confusing it with 'conjuncture' (a combination of circumstances).
Practice
Quiz
Which of the following is the best synonym for 'conjecture' in an academic context?
FAQ
Frequently Asked Questions
Yes, it is primarily used in formal, academic, or technical writing and is rare in everyday conversation.
Yes, though less common than the noun form. It means 'to form an opinion or guess'.
They are very close synonyms. 'Conjecture' can imply slightly more reasoning, while 'speculation' can imply more risk or uncertainty, but they are often interchangeable.
In mathematics, 'Fermat's Last Theorem' was a famous conjecture for over 350 years before it was finally proven.
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Advanced Academic Verbs
C2 · 49 words · Sophisticated verbs for scholarly discourse.
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