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
he speculates that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "he speculates that" is correct and usable in written English.
It can be used when discussing someone's conjectures or hypotheses about a particular topic or situation. Example: "In his latest article, he speculates that the economy will recover faster than expected."
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(20)
he suggests that
he infers that
he posits that
he believes that
he imagines that
he implies that
he requires that
he presupposes that
he supposes that
he argues that
he assumes that
he implicates that
he envisions that
he deserves that
he understands that
he mentions that
he loves that
he has that
he likes that
he enjoys that
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
He speculates that Thutmose was not after realism or even physical attractiveness when he made his masterpiece.
Science & Research
He speculates that including more dose groups would have allowed for better characterization of the dose response curve, especially in the lower-dose region reflecting likely human exposure levels.
He speculates that some plankton bump into the corals.
News & Media
He speculates that it might even help in marriage counseling.
News & Media
He speculates that a "united Osetiya" also might be incorporated into Eurasia-Russia (351).
Academia
He speculates that his high profile made it hard to kill him without attracting negative publicity.
News & Media
He speculates that perhaps it is because his blood vessels are dilated when he exercises.
News & Media
Then he speculates that the President was trying to "reach out" to "the Reverend Jackson".
News & Media
He speculates that social media like Facebook and Twitter may have made viewers more receptive to friendship-driven plotlines.
News & Media
He speculates that a healthy supply of bacteria in a fetus can reduce the chances of premature birth.
News & Media
He speculates that the government is counting on Google and Apple to twist arms in the ad world.
News & Media
Expert writing Tips
Best practice
Use "he speculates that" when you want to convey that someone is making a guess or forming a theory without firm evidence. Ensure the context supports this interpretation.
Common error
Avoid using "he speculates that" repeatedly without providing the basis for the speculation. Always offer some context or reason for the speculation to maintain credibility.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "he speculates that" functions as an attribution phrase, introducing a statement of conjecture or hypothesis. It indicates that the subject is offering an opinion or theory without definitive proof. According to Ludwig, this phrase is considered correct and usable.
Frequent in
News & Media
45%
Science
30%
Academia
15%
Less common in
Formal & Business
5%
Encyclopedias
3%
Wiki
2%
Ludwig's WRAP-UP
In summary, the phrase "he speculates that" is a grammatically correct and frequently used expression to introduce a conjecture or hypothesis made by someone. Ludwig AI confirms its validity, showcasing examples primarily in News & Media, Science, and Academic contexts. When using this phrase, it's important to provide adequate context to support the speculation and maintain credibility. Alternatives like "he suggests that" or "he infers that" can be used based on the specific nuance you wish to convey. The phrase carries a neutral to formal tone, making it suitable for a wide range of writing scenarios.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
he conjectures that
Similar to "speculates" but can imply a slightly more tentative or uncertain guess.
he suggests that
Uses a more neutral term than "speculates", implying a reasoned suggestion rather than pure guesswork.
he ventures that
Suggests a hesitant or bold guess, often when the situation is uncertain.
he hypothesizes that
Indicates a more formal, scientific approach to speculation, suggesting a testable hypothesis.
he posits that
Introduces a proposition or argument, often in an academic or theoretical context.
he infers that
Focuses on drawing a conclusion from evidence, suggesting a logical deduction.
he gathers that
Suggests an understanding or conclusion derived from various pieces of information.
he surmises that
Implies a conclusion based on limited information or intuition.
he believes that
Indicates a personal opinion or conviction, which may or may not be based on concrete evidence.
he imagines that
Implies a creative or hypothetical scenario, rather than a firm belief or reasoned conclusion.
FAQs
How can I use "he speculates that" in a sentence?
Use "he speculates that" to introduce a conjecture or hypothesis made by someone, for example: "In his new book, "he speculates that" climate change will cause significant disruptions to global food supplies".
What are some alternatives to "he speculates that"?
Depending on the context, you could use phrases like "he suggests that", "he hypothesizes that", or "he infers that" to convey similar meanings.
Is it appropriate to use "he speculates that" in formal writing?
Yes, "he speculates that" is appropriate for formal writing, especially when discussing theories or hypotheses in academic or professional contexts. However, ensure the tone remains objective and evidence-based.
What is the difference between "he speculates that" and "he states that"?
"He speculates that" implies uncertainty and conjecture, whereas "he states that" suggests a more definitive assertion. Use "he states that" when someone is presenting something as a fact or confirmed information.
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
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested