identical proposition
C2Formal, Academic, Technical
Definition
Meaning
In logic and philosophy, a statement that is necessarily true because its predicate merely repeats the information in its subject, e.g., 'A bachelor is an unmarried man.' It is a tautology.
In general usage, it can refer to any statement or claim that is trivially or obviously true, offering no new information. Sometimes used pejoratively to dismiss an argument as circular or uninformative.
Linguistics
Semantic Notes
The term is primarily technical within logic, philosophy, mathematics, and linguistics. In everyday language, it is rare and would be used deliberately to sound precise or critical. It carries a connotation of triviality or lack of substantive content.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. The term is used identically in academic contexts in both regions.
Connotations
Slightly more likely to be encountered in British philosophical writing due to historical traditions of analytic philosophy, but this is a minor distinction.
Frequency
Extremely low frequency in general corpora. Comparable, near-zero frequency in both BrE and AmE outside specialised texts.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] is an identical proposition.To claim [statement] is to utter an identical proposition.The argument reduces to an identical proposition.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[Not applicable for this technical term]”
Usage
Context Usage
Business
Virtually never used. A manager might metaphorically say, 'Telling us we need more profit is an identical proposition' to criticise an unhelpful statement.
Academic
Primary context. Used in logic, philosophy of language, and semantics to categorise a type of statement. E.g., 'The sentence "All vixens are female foxes" expresses an identical proposition.'
Everyday
Extremely rare. If used, it would be for deliberate, precise criticism. 'Saying the game was lost because we didn't score enough points is an identical proposition.'
Technical
Core context in formal logic and analytic philosophy. Precisely defined in contrast to synthetic or contingent propositions.
Examples
By Part of Speech
verb
British English
- [Not applicable as a verb]
American English
- [Not applicable as a verb]
adverb
British English
- [Not standard. 'Identically' is used, but not modifying 'proposition']
American English
- [Not standard. 'Identically' is used, but not modifying 'proposition']
adjective
British English
- The philosopher dismissed the claim as identically propositional, offering no new knowledge.
American English
- His argument had an identically propositional structure, making it logically empty.
Examples
By CEFR Level
- [Too advanced for A2]
- [Too advanced for B1]
- The definition 'a circle is a round shape' is almost an identical proposition.
- Critics said the politician's promise was an identical proposition, as it just repeated her earlier goals.
- In his essay, he argued that the alleged profound truth was merely an identical proposition disguised by complex vocabulary.
- The logical positivists classified all a priori knowledge as derived from identical propositions or tautologies.
Learning
Memory Aids
Mnemonic
Think: 'IDENTICAL' = the same. An identical proposition says the SAME thing twice in different words (e.g., 'free gift' – a gift is already free!).
Conceptual Metaphor
LANGUAGE AS A MIRROR (it merely reflects itself); THINKING AS CIRCULAR MOTION (going back to the starting point without progress).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate literally as "идентичное предложение" which would mean 'an identical offer/suggestion.' The correct equivalent is "тавтология" or "аналитическое суждение."
- The word 'proposition' here is a technical term from logic (суждение, пропозиция), not its more common meaning of 'offer' (предложение).
Common Mistakes
- Using it as a fancy synonym for 'same idea' or 'similar point.'
- Confusing it with 'identity statement' (e.g., 'Hesperus is Phosphorus'), which can be informative.
- Misspelling 'proposition' as 'proposal.'
Practice
Quiz
In which field is the term 'identical proposition' primarily and precisely used?
FAQ
Frequently Asked Questions
In classic logic, yes, they are essentially synonymous. Both refer to a statement that is true in all possible circumstances due to its logical form or meaning.
In ordinary communication, they are often unhelpful. However, in logic, mathematics, and philosophy, they are fundamental for defining terms, establishing logical systems, and clarifying concepts.
'All bachelors are unmarried men.' The predicate 'unmarried men' simply restates the definition of the subject 'bachelors,' so the statement is necessarily true but uninformative.
An identical proposition is a single, static statement. A circular argument (begging the question) is a faulty reasoning process where the conclusion is assumed in one of the premises. They are related flaws but the former is a statement type, the latter a reasoning error.