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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
Be valid
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "Be valid" is correct and usable in written English. You can use it in contexts where you want to emphasize that something should be accepted as true or legitimate. Example: "Please ensure that your arguments be valid before submission." Alternative expressions include "Be acceptable," "Be legitimate," and "Be sound."
✓ Grammatically correct
News & Media
Science
Academia
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
58 human-written examples
Validity: should be valid over time.
Science
Discriminant validity proved to be valid.
Both arguments may be valid.
News & Media
All would be valid concerns.
News & Media
They appeared to be valid.
News & Media
That may be valid in the abstract.
News & Media
Some of this criticism may be valid.
News & Media
Dr. Frances's assessment may be valid.
News & Media
Candidacy must also be valid.
Academia
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
Their complaints were valid.
News & Media
There are valid criticisms.
News & Media
Expert writing Tips
Best practice
In technical writing, distinguish between validity (structural correctness) and truth (actual factual accuracy) depending on your field.
Common error
In formal logic, an argument can "Be valid" even if its premises are false, as long as the conclusion follows logically from them. Do not use "Be valid" as a synonym for "be true" in rigorous academic or scientific writing without clarifying your intent.
Source & Trust
92%
Authority and reliability
4.9/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "Be valid" functions as a predicative adjective construction where the copula verb "to be" links a subject to the quality of being "valid". In the data provided by Ludwig, it is frequently preceded by modal verbs like "may", "must", or "should" to modulate the certainty or necessity of the state. It serves as the primary way to attribute legitimacy or logical integrity to a wide variety of subjects.
Frequent in
News & Media
45%
Academia
25%
Science
20%
Less common in
Formal & Business
6%
Wiki
3%
Social Media
1%
Ludwig's WRAP-UP
In summary, "Be valid" is a highly versatile and correct construction used to denote legitimacy and logical soundness. Ludwig shows that it is exceptionally common in authoritative spheres such as news media, scientific research, and academic law. Whether you are discussing the duration of a ticket or the integrity of a scientific theory, this phrase serves as a precise tool for verification. It is often enhanced by modal verbs to express levels of confidence. While it is broadly synonymous with being "legitimate" or "sound", its usage in technical fields requires careful attention to the specific definitions of validity versus truth.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Remain valid
Emphasizes the continued status of validity over a period of time.
Maintain validity
A more formal and active way to describe the preservation of valid status.
Hold true
Used primarily in abstract or logical contexts to signify that a statement or theory is correct.
Be legitimate
Specifically denotes legal standing or official acceptance.
Be sound
Focuses on the logical integrity and structural correctness of an argument.
Prove valid
Suggests a result or outcome after a period of testing or scrutiny.
Stay in effect
Commonly used for laws, rules, or contracts that are currently active.
Stand up
Idiomatic expression often used to describe whether a claim holds up under examination.
Be acceptable
A broader, more general term for something being proper or correct.
Be applicable
Suggests that something is not just valid in theory but relevant to the current situation.
FAQs
How do I use "Be valid" in a sentence?
You can use "Be valid" to describe the status of a document or an idea, such as "The voucher will <a href="/s/be+valid" target="_blank" rel="alternative">be valid until the end of the month" or "Your concerns appear to <a href="/s/be+valid" target="_blank" rel="alternative">be valid in this context".
What is the difference between "Be valid" and "Be legitimate"?
While similar, "Be valid" often refers to logical soundness or meeting technical requirements, whereas to <a href="/s/be+legitimate" target="_blank" rel="alternative">be legitimate usually implies being lawful, authorized, or socially accepted.
Can I say "Hold true" instead of "Be valid"?
Yes, in logical or philosophical contexts, you can use <a href="/s/hold+true" target="_blank" rel="alternative">hold true to express that a principle or observation remains accurate.
Is it better to say "Be valid" or "Remain valid"?
If you are referring to a state that persists over time, such as a passport or a contract, <a href="/s/remain+valid" target="_blank" rel="alternative">remain valid is often more precise than simply using "Be valid".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
92%
Authority and reliability
4.9/5
Expert rating
Real-world application tested