Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
a certain number of principles
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a certain number of principles" is correct and usable in written English.
You can use it when referring to an unspecified quantity of principles that are relevant to a discussion or topic. Example: "In order to understand the theory, one must first grasp a certain number of principles that underpin it."
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(19)
a certain number of times
a certain number of degrees
a certain number of people
countless of times
again and again
on several occasions
twice over
on many occasions
at instances
various times
at agreements
on several times
on countless occasions
other times over
repeated time and again
in two separate instances
at establishments
at sites
at moments
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
1 human-written examples
"In France we have a certain number of principles.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
From these experimental studies on the growth plate as well as clinical experiences from the past, a certain number of surgical principles can be applied either directly or indirectly to ACL reconstruction with open growth plates.
That is what we have … a certain number of values and principles".
News & Media
These tests, which are quite easy to carry out, have to be numerous in order to follow the variations of soil along the road, but they have not yet become the usual practice in forest works, where reliance is usually placed upon the knowledge of the men in the field who are helped by a certain number of practical guiding principles plus their own experience.
This ribozyme should possess sufficient complexity to catalyze the reaction (X→Y) affecting the fitness of the ensemble and to include a certain number of evolvable positions allowing, in principle, the emergence of new activities.
Science
In other words, both leaders agreed on the principle that a certain number of Palestinians should return, but that the governing question should be how to limit that number in a way that preserves Israel's distinction as a state with a Jewish majority but that does not prejudice the rights of the Arab minority.
News & Media
In this situation, there will be a certain number of opportunities that are regulated by these equal opportunity principles that are available to those who have the least of these opportunities.
Science
It asks participants to sort cards that vary according to an unarticulated matching principle that changes after a certain number of correct responses.
The principle is simple: once you've seen a certain number of stories in a given period of time, you need to become a paid subscriber to keep viewing the site.
News & Media
In December 1964 a new electoral law introduced the principle of the "national remainder," by which a certain number of seats were distributed to parties according to their proportion of the vote.
Encyclopedias
Since the distribution of organelles and their DNA to daughter cells is, in principle, a stochastic process, mixed cells usually disappear after a certain number of cell divisions, and homoplasmic cell lineages arise.
Science
Expert writing Tips
Best practice
When using "a certain number of principles", ensure the context clarifies why the exact number is not specified, maintaining a balance between generality and precision.
Common error
Avoid using "a certain number of principles" when a more specific term or quantity can be provided. Overusing vague language can weaken your writing.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a certain number of principles" functions as a determiner phrase modifying the noun "principles". It indicates an unspecified quantity of principles, suggesting that while the principles are important, the precise number is either unknown or unimportant in the given context. Ludwig AI confirms its correctness.
Frequent in
News & Media
30%
Science
30%
Academia
15%
Less common in
Formal & Business
10%
Encyclopedias
5%
Wiki
10%
Ludwig's WRAP-UP
In summary, "a certain number of principles" is a grammatically sound and frequently used phrase to denote an unspecified quantity of guiding principles. Ludwig AI's analysis, along with the provided examples, confirms its broad applicability across diverse contexts, including news, science, and academia. While it's important to use this phrase judiciously, avoiding overuse and ensuring it adds value to the context, it remains a versatile tool for expressing the importance of underlying principles without specifying an exact count. Related phrases include "specific principles" and "particular set of principles", each offering slightly different nuances in meaning.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
specific principles
Replaces "a certain number of" with "specific", indicating a definite set.
particular set of principles
Substitutes "a certain number of" with "particular set of", highlighting a select group of principles.
some underlying principles
Uses "some underlying" instead of "a certain number of", emphasizing the foundational nature of the principles.
several core tenets
Replaces "a certain number of principles" with "several core tenets", changing both number and word choice.
a few key principles
Uses "a few key" instead of "a certain number of", suggesting a smaller, more important subset.
various fundamental concepts
Replaces "principles" with "fundamental concepts", changing the term while maintaining a similar meaning.
a defined set of rules
Substitutes "principles" with "rules", which carries a more rigid connotation.
select number of guidelines
Changes "principles" to "guidelines", implying a less strict set of principles.
a limited number of doctrines
Replaces "principles" with "doctrines", introducing a more formal and established connotation.
essential theoretical constructs
Replaces "principles" with "theoretical constructs", making the phrase more abstract and academic.
FAQs
How can I use "a certain number of principles" in a sentence?
You can use "a certain number of principles" to refer to an unspecified quantity of guiding ideas, as in, "The success of the project relied on "a certain number of principles".".
What phrases are similar to "a certain number of principles"?
Similar phrases include "specific principles", "particular set of principles", or "some underlying principles", each offering subtle differences in emphasis.
Is it better to be specific instead of using "a certain number of principles"?
While specificity is often preferred, "a certain number of principles" can be useful when the exact number is unknown, irrelevant, or intentionally left vague.
What's the difference between "a certain number of principles" and "a specific set of principles"?
"A certain number of principles" implies an unspecified quantity, whereas "a specific set of principles" suggests a well-defined and known collection of principles.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested