false premise
C1Academic, Formal, Literary
Definition
Meaning
an incorrect or untrue statement or assumption from which a conclusion or argument is derived.
In logic, philosophy, and argumentation, a false premise refers to a foundational proposition in a deductive argument that is factually incorrect, rendering the argument unsound even if the reasoning (logical form) is valid.
Linguistics
Semantic Notes
The phrase often appears in discussions of logical fallacies, critical thinking, and debate analysis. While the individual words are common, the compound phrase is domain-specific.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences; concept and term are identical across both varieties.
Connotations
Negative intellectual connotations in both varieties, implying flawed reasoning or ignorance of facts.
Frequency
Slightly more frequent in British English academic contexts due to traditional emphasis on formal logic and philosophy in some curricula.
Vocabulary
Collocations
Grammar
Valency Patterns
ARGUE from a false premiseCONCLUDE based on a false premiseIDENTIFY the false premiseSTART with a false premiseRELY on a false premiseVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Building on sand”
- “Garbage in, garbage out”
Usage
Context Usage
Business
The entire market forecast is based on a false premise about consumer spending.
Academic
The philosopher demonstrated that the argument's conclusion was invalid due to a false premise.
Everyday
His plan to get rich quickly rested on the false premise that it requires no effort.
Technical
In predicate logic, an argument with a false premise is unsound, regardless of its validity.
Examples
By Part of Speech
adjective
British English
- A false-premise argument
- The false-premise theory
American English
- An argument based on a false premise
- A false-premise approach
Examples
By CEFR Level
- If you believe that, your idea comes from a false premise.
- He was wrong because his thinking started with a false premise.
- The debate collapsed when she pointed out the opponent's false premise.
- Their entire policy is built on a false premise about human motivation.
- The author deconstructs the ideological narrative by meticulously exposing its central false premise.
- Any syllogism containing a false premise, while possibly valid, is necessarily unsound.
Learning
Memory Aids
Mnemonic
Think: FALSE START in a race. A false premise is a false start for an argument – if you begin incorrectly, you can't reach a true finish.
Conceptual Metaphor
FOUNDATIONS OF A BUILDING (A false premise is a cracked foundation; the whole structure is unsafe.)
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'ложная посылка' in non-academic contexts; it sounds overly technical. In debate, 'ошибочная исходная точка' or 'неверное допущение' may be more natural.
Common Mistakes
- Using 'false premise' to mean simply a 'lie' or 'untrue statement' outside the context of structured reasoning.
- Confusing with 'false conclusion' (the premise is the starting point, not the end result).
Practice
Quiz
What is the primary consequence of an argument based on a false premise?
FAQ
Frequently Asked Questions
Not exactly. A false premise is a specific type of factual error within an argument. A logical fallacy is an error in the reasoning process itself. An argument can have correct premises but contain a fallacy.
Yes, it can, purely by coincidence. This is known as the 'Fallacy of the False Premise' not guaranteeing a false conclusion, but it means the argument fails to prove the conclusion soundly.
You could say 'wrong starting point', 'bad assumption', or 'incorrect basic idea', though these phrases lack the precise logical connotation.
Question the foundational statements they present as facts. Ask: 'Is this actually true?', 'What evidence supports this initial claim?' If that foundational claim is verifiably wrong, it's a false premise.