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 speculated to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is speculated to" is a correct and usable phrase in written English.
This phrase usually implies uncertainty around the information being presented. It is often used when the speaker is implying something might be true, but can’t necessarily confirm it. Example sentence: The cause of the fire is speculated to be due to faulty wiring.
✓ Grammatically correct
Science
News & Media
Academia
Wiki
Alternative expressions(20)
is believed to be
is thought to be
is suggested to be
is assumed to
is considered to be
is rumored to be
is hypothesized to be
is presumed to be
is estimated to be
is suspected to be
it is conceivable that
is considered to
is supposed to
is presumed to
is anticipated to
is expected to
is believed to
is inferred to
is suspected to
is necessitated to
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
The species is speculated to be a short-distance migrant in some areas.
Academia
The species is speculated to undertake seasonal migrations or local dispersal, in some areas possibly altitudinally.
Academia
A rationale is provided wherein chemical resistance is speculated to be operative.
Science
Since advances are often meted out piecemeal, more money is speculated to be on the way.
News & Media
That drug, which is about to enter clinical trials, is speculated to be Amgen's Neupogen.
News & Media
Only one nest has ever been found, but the species is speculated to breed from January until August.
Academia
Both catalysts show a similar deactivation trend and coke is speculated to be the major reason for deactivation.
Science
Besides, the carbon in solid solution is speculated to have the effect on the refinement of α2 phase.
The policy maker that will take the reins from Governor Tarullo in overseeing the Fed's supervision and regulation of financial institutions is speculated to be Randal Quarles.
Academia
With a working title of Planet Nine, it is speculated to exist beyond Pluto.
News & Media
The spherical morphology is speculated to compose of P4VP block core and the PS block corona.
Expert writing Tips
Best practice
Use "is speculated to" when you want to convey that something is believed to be true based on incomplete evidence or conjecture. Be sure to provide context or supporting information to strengthen your statement.
Common error
Avoid using "is speculated to" excessively without providing any evidence or justification. Over-reliance on speculation can weaken your argument and credibility.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is speculated to" functions as a modal verb construction expressing uncertainty or conjecture. It indicates that a statement is based on speculation rather than concrete evidence. Ludwig AI confirms that the phrase is a valid construction.
Frequent in
Science
47%
News & Media
24%
Academia
15%
Less common in
Wiki
10%
Formal & Business
4%
Reference
0%
Ludwig's WRAP-UP
The phrase "is speculated to" serves as a valuable tool for expressing uncertainty and conjecture across various domains. As Ludwig AI confirms, this construction adheres to standard English grammar and enjoys frequent usage in scientific, news, and academic contexts. When employing "is speculated to", ensure you provide supporting evidence to bolster your claim, and avoid overusing it without justification. Alternatives such as ""is believed to be"" or ""is thought to be"" may offer subtle shifts in meaning depending on the desired nuance. By understanding its function and purpose, you can effectively integrate "is speculated to" into your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is believed to be
Expresses a belief or common assumption, suggesting a higher degree of acceptance than speculation.
is thought to be
Similar to "is believed to be", implying a general consensus or consideration.
is considered to be
Indicates a formal assessment or evaluation, suggesting a more reasoned judgment.
is suggested to be
Indicates a possibility based on some evidence, but not a definitive conclusion.
is rumored to be
Suggests the information is based on unconfirmed reports or hearsay.
is hypothesized to be
Implies a scientific hypothesis that requires further investigation and testing.
is presumed to be
Suggests an assumption based on probability or likelihood, often in the absence of concrete evidence.
is estimated to be
Implies that an approximate calculation has been made, but the exact value is unknown.
is suspected to be
Indicates a belief based on limited evidence, often with a negative connotation.
it is conceivable that
Emphasizes the possibility or imaginability of something happening or being true.
FAQs
How can I use "is speculated to" in a sentence?
You can use "is speculated to" to introduce a theory or possibility that hasn't been proven. For example, "The increase in sales "is speculated to be due to" the new marketing campaign".
What are some alternatives to "is speculated to"?
Alternatives include "is believed to be", "is thought to be", or "is suggested to be", depending on the nuance you want to convey.
When is it appropriate to use "is speculated to"?
Use "is speculated to" when presenting information that is not definitively proven but is based on some level of reasoning or evidence. It's suitable for academic discussions, news reports, and general discourse where uncertainty is present.
What's the difference between "is speculated to" and "is assumed to"?
"Is speculated to" implies a degree of uncertainty and conjecture, whereas "is assumed to" suggests something is taken for granted without concrete proof. "Is speculated to" often invites further investigation or discussion.
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested