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
is valid
Grammar usage guide and real-world examplesUSAGE SUMMARY
"is valid" is a correct and usable phrase in written English.
It is generally used to suggest that something is correct or acceptable. For example, "This argument is valid and should be considered."
✓ Grammatically correct
News & Media
Science
Academia
Wiki
Encyclopedias
Formal & Business
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
59 human-written examples
Billick's point is valid.
News & Media
And "international" is valid.
News & Media
Their point is valid.
News & Media
It is valid today.
News & Media
Prize is valid until February.
News & Media
The act is valid.
Academia
Whatever brings comfort is valid.
News & Media
It is valid through April.
News & Media
But it is valid journalism.
News & Media
But the impulse is valid.
News & Media
The syllogism above is valid.
Encyclopedias
Expert writing Tips
Best practice
When using the phrase, ensure you clarify the scope of validity. For example, 'The ticket is valid for one entry only', specifies the context of the ticket’s validity.
Common error
Avoid assuming something is universally valid without specifying the context. Saying "His opinion is valid" without qualification can be vague. Instead, state, "His opinion is valid within the scope of personal experiences."
Source & Trust
82%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is valid" functions as a predicate adjective, attributing a quality of legitimacy, correctness, or justification to a subject. Ludwig shows its use across various contexts, affirming the acceptability or soundness of arguments, documents, or actions. Ludwig AI confirms it is a correct and usable phrase.
Frequent in
News & Media
30%
Science
28%
Academia
13%
Less common in
Wiki
9%
Encyclopedias
6%
Formal & Business
5%
Ludwig's WRAP-UP
In summary, "is valid" is a versatile phrase used to affirm the legitimacy, correctness, or justification of something. Ludwig AI confirms the phrase is correct and usable. Examples from Ludwig highlight its frequent use across diverse contexts, from news and media to scientific and academic domains. It is often employed to convey that an argument, document, or action meets specific criteria or standards. While applicable in informal settings, it leans towards a neutral to professional register, suggesting authority and clarity. When using this phrase, ensure you clarify the scope of validity to avoid overgeneralizations. Alternatives like "is legitimate", "is acceptable", and "is justified" offer nuanced ways to express similar ideas, as shown in the related phrases.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
is legitimate
Replaces "valid" with "legitimate", emphasizing lawfulness or acceptance according to rules or standards.
is acceptable
Focuses on the idea that something meets a certain standard or requirement and is therefore allowed or suitable.
is correct
Highlights the accuracy or truthfulness of something, implying it aligns with facts or principles.
is justified
Emphasizes the presence of a good reason or explanation for something, making it reasonable or defensible.
is well-founded
Stresses the existence of a solid basis or foundation for something, suggesting it's reliable and likely to be true.
is sound
Implies that something is reliable, logical, and free from errors or defects.
is reasonable
Indicates that something is fair, sensible, and in accordance with reason or good judgment.
is applicable
Suggests that something is relevant or appropriate to a particular situation or context.
is admissible
Highlights that something is allowed or can be accepted, especially in a formal or legal context.
is effective
Focuses on the idea that something produces the intended or desired result, making it successful or useful.
FAQs
How can I use "is valid" in a sentence?
You can use "is valid" to confirm the legitimacy or correctness of something, such as "The passport is valid for ten years" or "His argument is valid because it's based on evidence."
What's the difference between "is valid" and "is correct"?
"Is valid" implies something is logically sound or legally acceptable, while "is correct" suggests factual accuracy. For example, a valid argument may not be correct if its premises are false, and a correct statement might not be valid if it's irrelevant.
What can I say instead of "is valid"?
You can use alternatives like "is legitimate", "is acceptable", or "is justified" depending on the specific context and the nuance you want to convey.
When is it appropriate to use "is valid" in formal writing?
Use "is valid" in formal writing when you need to affirm the correctness, legality, or logical soundness of an idea, document, or process. For instance, "The research methodology is valid according to established scientific standards."
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
82%
Authority and reliability
4.6/5
Expert rating
Real-world application tested