Is 'noncontradiction' the same as 'consistency'?

In formal logic, the 'law of noncontradiction' is a specific axiom that contributes to a system's consistency. In everyday language, 'consistency' is a broader, more general synonym.

Can I use 'noncontradiction' in everyday conversation?

It would sound extremely formal and out of place. Use simpler terms like 'consistency', 'not contradicting yourself', or 'being logical' instead.

Who famously wrote about the law of noncontradiction?

Aristotle in his work 'Metaphysics' is famously associated with formulating and defending the law of noncontradiction as a foundational principle of rational thought.

Is it spelled with a hyphen?

Both 'noncontradiction' (especially in US English) and 'non-contradiction' (often in UK English) are accepted. The hyphenated form is generally preferred in British style guides for clarity with the 'non-' prefix.

noncontradiction

Very low (C2/Advanced)

UK/ˌnɒnkɒntrəˈdɪkʃ(ə)n/US/ˌnɑːnkɑːntrəˈdɪkʃən/

Formal, Academic, Technical (Logic/Philosophy)

My Flashcards

Definition

Meaning

The logical principle that a statement and its opposite cannot both be true at the same time and in the same sense.

In broader philosophical and legal contexts, the concept that a set of propositions or positions must be internally consistent and not contain mutually exclusive claims.

Linguistics

Semantic Notes

Primarily a technical term in formal logic and philosophy, specifically linked to the law of noncontradiction. It is a concept, not an action, and is almost exclusively used as a noun.

Dialectal Variation

British vs American Usage

Differences

No significant difference in meaning or usage. Spelling variation: 'non-contradiction' (UK often prefers hyphen) vs. 'noncontradiction' (US more common as single word).

Connotations

Identical; denotes a formal logical principle.

Frequency

Extremely rare in everyday speech in both varieties, restricted to specialist discourse. Similar near-zero frequency.

Vocabulary

Collocations

strong

principle of noncontradictionlaw of noncontradictionaxiom of noncontradiction

medium

violate noncontradictionlogical noncontradictionformal noncontradiction

weak

strict noncontradictionabsolute noncontradictionrequire noncontradiction

Grammar

Valency Patterns

the principle of [noncontradiction] (n.)to maintain [noncontradiction] (n.) in one's argumenta test for [noncontradiction] (n.)

Vocabulary

Synonyms

Strong

law of contradiction

Neutral

consistencylogical coherence

Weak

lack of contradictionself-consistency

Vocabulary

Antonyms

contradictioninconsistencyparadoxincoherence

Phrases

Idioms & Phrases

“[None directly. Concept underpins idioms like 'doublethink' or 'having it both ways'.]”

Usage

Context Usage

Business

Virtually never used.

Academic

Used in logic, philosophy, mathematics, critical thinking, and legal theory papers. e.g., 'The argument hinges on the law of noncontradiction.'

Everyday

Extremely rare. Might be used in highly formal debate or intellectual discussion.

Technical

Core term in formal logic and analytic philosophy. Fundamental axiom in many logical systems.

Examples

By Part of Speech

verb

British English

[No verb form exists. The concept cannot be directly 'done'.]

American English

[No verb form exists. The concept cannot be directly 'done'.]

adverb

British English

[No standard adverb form. One might awkwardly say 'non-contradictorily'.]

American English

[No standard adverb form. One might awkwardly say 'noncontradictorily'.]

adjective

British English

The philosopher's non-contradiction principle is foundational.

Examples

By CEFR Level

[This word is far beyond A2 level. Not applicable.]

[This word is far beyond B1 level. Not applicable.]

The essay was criticised for its lack of noncontradiction; it argued for two opposite points.

Any coherent legal system must adhere to the principle of noncontradiction to avoid arbitrary rulings.
Her thesis successfully defended the law of noncontradiction against postmodern critiques.

Learning

Memory Aids

Mnemonic

Think: NON-CONTRADICTION = 'NO saying A and NOT-A are both true'. It's the 'NO-NO' rule of logic.

Conceptual Metaphor

LOGICAL FOUNDATION (A bedrock principle), RULE OF THE GAME (A fundamental rule of rational discourse).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Avoid translating as 'непротиворечивость' (which is 'consistency') in casual contexts. The philosophical term 'закон непротиворечия' is the direct equivalent.
Do not confuse with 'противоречие' (contradiction). The prefix 'non-' is crucial.

Common Mistakes

Using it as a verb (e.g., 'I noncontradict you').
Confusing it with 'contradiction'.
Spelling as 'non contradiction' or 'noncontraduction'.
Using it in casual conversation where 'consistency' would suffice.

Practice

Quiz

Fill in the gap

A basic rule of logic, the principle, states that 'A' and 'not A' cannot both be true.

Multiple Choice

In which field is the term 'noncontradiction' MOST commonly used?

FAQ

Frequently Asked Questions

: In formal logic, the 'law of noncontradiction' is a specific axiom that contributes to a system's consistency. In everyday language, 'consistency' is a broader, more general synonym.
: It would sound extremely formal and out of place. Use simpler terms like 'consistency', 'not contradicting yourself', or 'being logical' instead.
: Aristotle in his work 'Metaphysics' is famously associated with formulating and defending the law of noncontradiction as a foundational principle of rational thought.
: Both 'noncontradiction' (especially in US English) and 'non-contradiction' (often in UK English) are accepted. The hyphenated form is generally preferred in British style guides for clarity with the 'non-' prefix.