one cannot be certain that

USAGE SUMMARY

The phrase "one cannot be certain that" is correct and usable in written English.
It can be used when expressing doubt or uncertainty about a particular statement or situation. Example: "One cannot be certain that the results will be the same in every trial."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

19 human-written examples

However, since information on the originally sampled schools is very limited, one cannot be certain that there are no systematic differences between the sampled and their replacement schools that could cause nonresponse on one side but not on the other.

Large-scale Assessments in Education

One cannot be certain that the breast cancer cases had high fat intakes.

Britannica

One doubts that the President would undertake this step unless Mr. Mitchell asked for it and even then one cannot be certain that Mr. Nixon would accede.

The New York Times

Additionally, in those instances where teachers reported reductions in behaviour problems post-intervention and at follow-up, they also reported these in the waitlist-to-baseline period where no intervention occurred; and as such one cannot be certain that any improvements are related to intervention effects.

Nature

The difficulty is that one cannot be certain that what they are analysing is not contaminated by tweets stimulated in some way from particular pharmaceutical companies.

F1000Research

Even when an article's title seems to be clear, one cannot be certain that the article deals with a scenario project [ 31, 90].

BMC Medical Research Methodology

Human-verified similar examples from authoritative sources

Similar Expressions

41 human-written examples

One cannot be certain the starting (base) and final energy levels involved here, we can only be certain that the energy difference is about 2 eV.

Nanoscale Research Letters

And we know from living at a time when terrorist threat induces in many of us a feeling of standing fear, how dangerous to the psyche it is to feel that one cannot be certain or safe in one's surroundings.

Yale University

One cannot be certain however about this until an embedding is actually constructed, which means that specific group elements have to be indicated and certain properties that are required for a proper embedding have to be tested.

Massachusetts Institute of Technology

Nevertheless, although one cannot be certain, the trend in the accumulating evidence is increasingly against the hypothesis that mobile phone use causes brain tumors.

Environmental Health Perspectives

Why make one's life miserable simply because one cannot be certain?

Huffington Post

Expert writing Tips

Best practice

In formal writing, consider using "it is uncertain whether" as a slightly more concise alternative to "one cannot be certain that".

Common error

Avoid using "one cannot be certain that" in casual conversations or informal writing, as it can sound overly formal or stilted. Opt for simpler phrases like "I'm not sure" or "it's unclear".

Linguistic Context

The phrase "one cannot be certain that" functions as an epistemic hedge, expressing a degree of uncertainty or tentativeness. It softens a statement, indicating that the speaker or writer is not making an absolute claim. According to Ludwig AI, the phrase is grammatically correct and usable in written English.

Expression frequency: Common

Frequent in

Science

60%

News & Media

25%

Encyclopedias

15%

Less common in

Formal & Business

0%

Wiki

0%

Academia

0%

Ludwig's WRAP-UP

In summary, the phrase "one cannot be certain that" serves as a grammatically sound and frequently used method for expressing uncertainty or doubt. As verified by Ludwig AI, it is deemed correct. Predominantly found within scientific, news, and encyclopedia contexts, this construction provides a formal and neutral way to indicate a lack of absolute assurance. While versatile, its formal tone makes it less suitable for informal settings. By considering alternative phrases like "it is uncertain whether" or "I'm not sure", writers can tailor their language to fit the intended audience and context more precisely.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

it is uncertain whether

Replaces the personal pronoun "one" with "it" and simplifies the structure while maintaining a formal tone.

it is impossible to be sure that

Emphasizes the impossibility of attaining certainty, strengthening the expression of doubt.

it is difficult to say whether

Highlights the difficulty in making a definitive statement, focusing on the challenge of certainty.

we cannot be sure that

Shifts from the impersonal "one" to a more direct and personal "we", creating a slightly less formal tone.

there is no guarantee that

Indicates that there's no assurance of a particular outcome, emphasizing the absence of a promise or certainty.

it remains to be seen whether

Suggests that the outcome is still pending and not yet determined, focusing on the future and the absence of current certainty.

the certainty of that is not possible

Inverts the structure to emphasize that the certainty itself is unattainable.

doubt remains that

Highlights the existence of doubt as a continuing factor, focusing on the persistence of uncertainty.

it's hard to know if

Uses a more informal contraction "it's" and the simpler "if" to express uncertainty in a casual way.

it's not clear whether

Uses the informal contraction "it's" to indicate that the truth or outcome is ambiguous or unknown.

FAQs

How can I rephrase "one cannot be certain that" to sound more formal?

For a more formal tone, consider alternatives like "it is uncertain whether" or "it is impossible to be sure that". These options maintain a sophisticated tone while conveying uncertainty.

What's a simpler way to express "one cannot be certain that" in everyday conversation?

In everyday conversation, you can use phrases like "I'm not sure", "it's unclear", or "it's hard to know" to convey the same meaning without sounding overly formal.

Is "one cannot be certain that" grammatically correct?

Yes, "one cannot be certain that" is grammatically correct. The structure is proper, and it effectively conveys a sense of uncertainty. It is deemed correct by Ludwig AI.

When is it most appropriate to use the phrase "one cannot be certain that"?

The phrase "one cannot be certain that" is best used in formal writing, academic papers, or professional reports where a degree of uncertainty needs to be conveyed with precision and a neutral tone.