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
but this is speculative
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "but this is speculative" is correct and usable in written English.
You can use it when discussing ideas, theories, or predictions that are not based on solid evidence or facts. Example: "While we can consider the potential outcomes of this project, it's important to note that this is speculative and should be treated as such."
✓ Grammatically correct
Science
News & Media
Alternative expressions(2)
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
7 human-written examples
"But this is speculative and one of the challenges we face when we try to make a transition from animal to human research".
News & Media
Denying pirates the benefit of kidnapping or taking the crew hostage when they board is similar to removing a domestic violence victim to a safe house to avoid an attack (Storey et al. 2014), but this is speculative since evaluating safe rooms aboard ships has yet to be studied.
Science
There are examples suggesting that RNA developed to proteins, e.g., the antiviral defense mechanism from RNA-based siRNA to protein-based interferon [ 63], but this is speculative.
Science
If we took both effects into account, a potential reduction of 84.3% is possible, but this is speculative at this stage.
Science
It is intriguing to hypothesize that complexes of self-RNA andantimicrobial peptides, which have been reported to stimulate TLR7 and TLR8 [ 23], could also activate TLR3, but this is speculative.
There may be a relationship to the reproductive age in younger females or to the use of contraceptive medication but this is speculative and several confounding factors need to be considered.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
52 human-written examples
But he "admits that this is speculative and that no proof for it is possible," Judge Pamela Ann Rymer wrote in the 2-to-1 decision.
News & Media
All this is speculative, but any work of art with beauty, mystery and unpredictability will turn off the internal dialogue and negative emotions propagated by that dialogue".
News & Media
This is speculative but, based purely on the way his eyebrows manage to worm their way across every square centimetre of his face in the trailers, there's a pretty good chance that Cranston will redefine hamminess as we know it in this month's Godzilla remake.
News & Media
this is speculative, but we think it might benefit Google.
News & Media
The reason for this is speculative, but may reflect improved levels of education and health care delivery.
Science
Expert writing Tips
Best practice
Use "but this is speculative" to clearly signal that the information or idea you are presenting is not based on definitive proof and should be considered with caution.
Common error
Avoid presenting information introduced with "but this is speculative" as if it were a confirmed fact. Always maintain a clear distinction between speculation and established knowledge.
Source & Trust
86%
Authority and reliability
4.4/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "but this is speculative" functions as a disclaimer or hedge. It acknowledges the preceding statement is based on conjecture, hypothesis, or incomplete information. As Ludwig AI confirms, it's a grammatically correct way to introduce uncertainty.
Frequent in
Science
60%
News & Media
40%
Formal & Business
0%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "but this is speculative" serves as a crucial linguistic tool to indicate that a preceding statement is based on conjecture rather than concrete evidence. Ludwig AI confirms its grammatical correctness, it is categorized as a conjunction phrase. Predominantly found in science and news media, it signals caution and manages expectations. While grammatically sound and readily understood, remembering its function as a qualifier is key to effective communication. Using alternatives like "however, that remains unconfirmed" or clearly differentiating between speculation and fact ensures clarity and precision in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
nonetheless, the statement is speculative
Highlights that the statement is founded on speculation rather than established fact.
however, that remains unconfirmed
Emphasizes the lack of validation or corroboration for the statement.
yet, that is still conjecture
Highlights that the statement is based on guesswork or speculation.
however, that's just a hypothesis
Indicates that the statement is a proposed explanation that needs further testing.
nonetheless, that is merely theoretical
Suggests that the statement is based on abstract principles rather than empirical evidence.
still, that's only a possibility
Conveys that the statement is one potential outcome among many.
even so, that cannot be proven
Indicates that the statement is not amenable to empirical verification.
however, that's far from certain
Underscores the considerable doubt surrounding the statement.
even then, that's only an educated guess
Positions the statement as an informed estimate, but not a definitive conclusion.
yet, that is only surmised
Highlights that the statement is based on inference or assumption.
FAQs
How can I use "but this is speculative" in a sentence?
You can use "but this is speculative" to introduce an idea, theory, or prediction that isn't yet backed by solid evidence. For example, "The new policy might boost the economy, but this is speculative and needs further analysis."
What's the difference between "but this is speculative" and "but this is uncertain"?
"But this is speculative" suggests the information is based on conjecture or guesswork. "But this is uncertain" ("but this is uncertain") implies there's a lack of definitive knowledge or predictability about the outcome.
Are there situations where it's better to avoid using "but this is speculative"?
In situations where precision and confidence are paramount, such as legal documents or critical scientific reports, it may be better to avoid phrases that undermine certainty. Consider alternatives like "further research is needed" or "the results are preliminary."
What can I say instead of "but this is speculative" to sound more formal?
In formal contexts, you could use phrases like "however, that remains unconfirmed" or "nonetheless, that is merely theoretical" to convey the same sense of uncertainty with a higher degree of formality.
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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
86%
Authority and reliability
4.4/5
Expert rating
Real-world application tested