law of parsimony
C2Formal, Academic, Technical
Definition
Meaning
A principle stating that the simplest explanation, requiring the fewest assumptions, is usually the correct one.
A heuristic and methodological guideline in science, philosophy, and logic that favors theories and models with the least complexity or number of entities. Often summarized as 'entities should not be multiplied beyond necessity'.
Linguistics
Semantic Notes
This is a technical term for a specific logical and scientific principle. In everyday conversation, the concept is often simplified as 'Occam's razor'. The term itself is rarely used outside academic or specialist contexts.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Both varieties use the term primarily in academic and scientific contexts.
Connotations
Formal, precise, intellectual. Used primarily in philosophy of science, logic, and research methodology.
Frequency
Equally low frequency in both varieties, confined to specialized discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
The law of parsimony suggests (that)...According to the law of parsimony, ...One should apply the law of parsimony when...Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Occam's razor”
Usage
Context Usage
Business
Rare. Potentially used in strategic planning or problem-solving to advocate for the simplest viable solution.
Academic
Common in philosophy of science, logic, biology (especially phylogenetics), and psychology. Central to discussions of model selection and theoretical elegance.
Everyday
Extremely rare. The concept might be referenced indirectly as 'the simplest explanation'.
Technical
Essential in scientific methodology, statistics (e.g., model selection criteria like AIC), and computer science (algorithm design).
Examples
By Part of Speech
verb
British English
- The researcher sought to parsimoniously explain the data.
- We should parsimonise our theoretical framework.
American English
- The model parsimoniously accounts for all variables.
- He argued for parsimonizing the hypothesis.
adverb
British English
- The data were analysed parsimoniously.
- He argues, quite parsimoniously, for a single-cause explanation.
American English
- The system was designed parsimoniously to avoid waste.
- She writes parsimoniously, with no unnecessary detail.
adjective
British English
- The most parsimonious interpretation of the evidence was rejected.
- They proposed a delightfully parsimonious solution.
American English
- A parsimonious model is not necessarily the correct one.
- Her theory was praised for its parsimonious elegance.
Examples
By CEFR Level
- Scientists often choose the simplest explanation. This idea is sometimes called the law of parsimony.
- If you have two possible answers, the simpler one is often better.
- When developing a new theory, researchers are advised to follow the law of parsimony and avoid unnecessary complexity.
- The detective applied a kind of law of parsimony, reasoning that the simplest motive was probably the right one.
- Phylogenetic analysis relies heavily on the law of parsimony to infer evolutionary relationships with the fewest possible character-state changes.
- Critics argued that the new quantum model violated the law of parsimony by introducing several untestable dimensions.
Learning
Memory Aids
Mnemonic
Think: 'Parsimonious' means frugal or stingy. The 'Law of Parsimony' is being 'stingy' with assumptions – use the fewest possible.
Conceptual Metaphor
SCIENTIFIC RIGOR IS ECONOMY / A GOOD THEORY IS A LEAN MACHINE.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Прямой перевод 'закон бережливости' может звучать странно. Более точный контекстуальный перевод — 'принцип простоты (объяснения)' или 'бритва Оккама'.
- Не путать с экономическим термином 'parsimony' (скупость). В научном контексте это о логической экономности.
Common Mistakes
- Confusing 'parsimony' (frugality in assumptions) with 'parsimonious' (stingy with money) in non-technical contexts.
- Using it as a synonym for 'truth' rather than a heuristic or methodological guideline.
- Misspelling as 'law of parsimoney'.
Practice
Quiz
The 'law of parsimony' is most closely associated with which of the following concepts?
FAQ
Frequently Asked Questions
In modern usage, they are virtually synonymous. 'Occam's razor' is the more common and proverbial term, while 'law of parsimony' is the more formal, academic phrasing of the same principle.
No, it is not a law in the sense of a physical law like gravity. It is a methodological principle, a heuristic, or a rule of thumb that guides reasoning and theory construction. It suggests simplicity is a virtue, not a guarantee of truth.
It is fundamental in the philosophy of science, statistical model selection (e.g., using AIC or BIC), evolutionary biology (for building phylogenetic trees), and in detective work or diagnostic reasoning.
A key criticism is that the 'simplest' explanation is not always the correct one; reality can be complex. Furthermore, 'simplicity' itself can be subjective—what seems simple in one conceptual framework may be complex in another.