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
are believed
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are believed" is correct and usable in written English.
It is typically used to indicate a general opinion or belief held by people regarding a particular subject or situation. Example: "The ancient ruins are believed to be over a thousand years old, according to historians."
✓ Grammatically correct
News & Media
Science
Academia
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
60 human-written examples
(Eleven more are believed lost).
News & Media
The attackers are believed to be jihadists.
News & Media
Both are believed to be abandoned pets.
News & Media
They are believed killed by the authorities.
News & Media
Chilis are believed to have health benefits.
News & Media
They are believed to be illegal immigrants.
News & Media
Some members are believed to have quit.
News & Media
Arsenal are believed to be monitoring events.
News & Media
They are believed to be friends.
News & Media
Both infections are believed to be underreported.
News & Media
Most are believed to be civilians.
News & Media
Expert writing Tips
Best practice
Use "are believed" to convey a sense of widespread, but not necessarily proven, acceptance. It's particularly useful when presenting information that is based on inference or general consensus.
Common error
Avoid using "are believed" when presenting established facts or scientifically proven data. Reserve it for situations where evidence is suggestive but not conclusive.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are believed" functions as a passive construction, indicating that a belief is held by an unspecified group of people or a general consensus. As Ludwig AI confirms, it's a grammatically correct way to express a commonly held opinion or assumption, as evidenced by numerous examples.
Frequent in
News & Media
39%
Science
36%
Academia
10%
Less common in
Formal & Business
9%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "are believed" serves as a versatile tool for expressing common beliefs or assumptions without asserting them as proven facts. Ludwig AI validates its grammatical correctness and prevalence across diverse contexts, including news, science, and academia. While highly common, it's crucial to use this construction judiciously, avoiding its application to definitively established information. Alternatives like "are thought to be" or "are considered to be" can offer subtle shifts in tone and emphasis, further enhancing the precision and effectiveness of your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
are thought to be
Similar in meaning, but slightly more formal and emphasizes the thinking process.
it is thought that
Uses "thought" as a synonym for "believed", conveying a slightly less certain tone.
are considered to be
Implies a more deliberate evaluation or judgment.
it is believed that
Restructures the phrase, placing emphasis on the general belief rather than the subject.
it's considered that
Uses "considered" to suggest that the phrase is evaluated.
are deemed to be
More formal and suggests an official or authoritative judgment.
are presumed to be
Indicates an assumption based on probability, but without definitive proof.
people believe that
Explicitly attributes the belief to a group of people, providing a more direct assertion.
are understood to be
Suggests a common or widespread understanding.
are rumored to be
Indicates information based on unofficial sources or speculation.
FAQs
How can I use "are believed" in a sentence?
The phrase "are believed" is typically used to express a common, but not necessarily proven, assumption or opinion. For example: "The artifacts "are believed to be" of Roman origin."
What are some alternatives to "are believed"?
Alternatives include "are thought to be", "are considered to be", and "are presumed to be depending" on the degree of certainty you wish to convey.
Is it correct to say "is believed" instead of "are believed"?
The choice between "is believed" and "are believed" depends on whether you're referring to a singular or plural subject. Use "is believed" for singular subjects (e.g. "The theory is believed to be correct") and "are believed" for plural subjects (e.g. "The theories "are believed to be" correct").
What's the nuance between "are believed" and "are known"?
"Are believed" indicates a degree of uncertainty or assumption, while "are known" implies established fact or proven knowledge. For example, "The rumors "are believed to be" false" suggests the falsity is an opinion, whereas "The facts "are known to be" false" suggests it has been definitively proven.
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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested