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
but not indispensable
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "but not indispensable" is correct and usable in written English.
It can be used to indicate that something is not essential or necessary, even though it may be helpful or beneficial. Example: "While teamwork is important for project success, individual contributions are valuable but not indispensable."
✓ Grammatically correct
News & Media
Science
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
7 human-written examples
"Let me put it this way you're irreplaceable but not indispensable".
News & Media
A nice man would be good to find, but not indispensable.
News & Media
Michael Leiter, who led the National Counterterrorism Center under George W. Bush and Obama, told me that Section 215 was useful but not indispensable: "Could we live without Section 215? Yes.
News & Media
Reduction of NOx to N2 over zeolite-based catalysts is a multi-step reaction for which transition metal (TM) ions are helpful but not indispensable.
Science
When objects of innovation are merely helpful, but not indispensable to reach an intended outcome, as is the case with most of agricultural innovation, the basic needs doctrine loses strength.
The expression of a number of vital genes was observed to be affected in absence of PykA, showing that mtPykA is important for the cell but not indispensable.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
In contrast, in arn1Δ, although a portion of the transporter was internalized within 15 minutes following the stimulation with nitrogen sources, the majority remained on the PM (Fig. 4B), suggesting that Arn1 is involved, but is not indispensable, in the nutrient-dependent Cat1 endocytosis.
Science
Note that the growth of InN NWs via direct nitridation of In with NH3 is enhanced using Au on Si(111) which aids the formation of In droplets but it is not indispensable as InN NWs have been also grown directly on quartz and Si 001).
Science
In his eyes it is best for Britain -- and him -- to stay inside the EU, but it is not indispensable.
News & Media
These factors can increase the adaptability of microorganisms to the niches they inhabit, but they are not indispensable to the survival of pathogens.
Science
Husserl himself believed that such studies require a previous suspension of belief ("epochē") in the reality of these phenomena, whereas others consider it not indispensable but helpful.
Encyclopedias
Expert writing Tips
Best practice
Use "but not indispensable" to offer constructive feedback, acknowledging value without implying absolute reliance. This is particularly useful in professional or academic settings.
Common error
Avoid using "but not indispensable" when the subject is genuinely crucial. Overusing the phrase can diminish its impact and confuse your message, implying something is optional when it's actually vital.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "but not indispensable" functions as a qualifying conjunction, used to temper the importance of something previously mentioned. It indicates that while something may be valuable or useful, it is not absolutely essential or irreplaceable. As Ludwig AI confirms, the phrase is grammatically correct.
Frequent in
News & Media
40%
Science
50%
Encyclopedias
10%
Less common in
Formal & Business
0%
Reference
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "but not indispensable" serves to qualify the importance of something, indicating it is helpful or valuable without being absolutely essential. As Ludwig AI confirms, the phrase is grammatically sound and has varied applications and contexts. The phrase is often found in News & Media and Science, suggesting a neutral register. When using this phrase, it's important to ensure that you are not understating the importance of something truly critical, and to create a balanced perspective by first highlighting the positive aspects before clarifying its non-essential nature.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
but not essential
Replaces "indispensable" with "essential", emphasizing a lack of necessity.
but not crucial
Substitutes "indispensable" with "crucial", suggesting something is not vital.
but not necessary
Replaces "indispensable" with "necessary", indicating something is not required.
helpful but not required
Emphasizes the helpfulness while stating it's not a requirement.
valuable but not mandatory
Highlights the value while clarifying it's not compulsory.
useful but not obligatory
Indicates the usefulness without being a binding obligation.
advantageous but not vital
Highlights the advantage, but deemphasizes its importance.
significant but not critical
Points out significance, but denies critical importance.
important but not a must
Emphasizes the importance but clarifies it isn't absolutely needed.
desirable but not compulsory
Indicates a preference without making it a firm requirement.
FAQs
How can I use "but not indispensable" in a sentence?
Use "but not indispensable" to indicate something is valuable or helpful, but not absolutely necessary. For example, "Teamwork is important, "but not indispensable", for project success."
What phrases are similar to "but not indispensable"?
Similar phrases include "but not essential", "but not crucial", or "but not necessary". These alternatives emphasize that something isn't a strict requirement.
Is "but not indispensable" formal or informal?
"But not indispensable" is suitable for both formal and informal contexts. Its neutrality allows usage across various types of communication.
What's the difference between "but not indispensable" and "irreplaceable"?
"But not indispensable" means something is not absolutely necessary, while "irreplaceable" means something is unique and cannot be substituted. The opposite of "but not indispensable", therefore, is not "irreplaceable", but rather something along the lines of "absolutely essential".
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested