I cannot ascertain

USAGE SUMMARY

The phrase "I cannot ascertain" is correct and usable in written English.
You can use it when expressing uncertainty or inability to determine or figure out something. Example: "After reviewing the evidence, I cannot ascertain the cause of the issue."

✓ Grammatically correct

Science

News & Media

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

1 human-written examples

He argued that it is consistent with all the facts that I am indeed a Turing machine, but that I cannot ascertain which one.

SEP

Human-verified similar examples from authoritative sources

Similar Expressions

59 human-written examples

Is it true that if we can't know what the (whole) truth of some matter is, we also cannot ascertain whether or not we are making progress towards it?

SEP

There will obviously be times where we cannot ascertain who had the assignment which got blown.

The New York Times

But some players and coaches feel the television coverage provides a few details they cannot ascertain from the silent, restricted-angle game tape they study.

The New York Times - Sports

"Persons who wish to criticize and comment on them cannot ascertain which sites are contained in the lists unless they circumvent," the ruling said.

The New York Times - Tech

Even considering the allegations of fact as set forth in the complaint, we cannot ascertain allegations in the complaint that support each of these elements.

Harvard University

"We cannot ascertain the number of people killed for now, and moreover we cannot say what or who was responsible for the attack," Mr. Adenaike said.

The New York Times

But it is still necessary that the officer reasonably suspects you of an offence, and that he cannot ascertain your name (by, say, asking you) or has reasonable grounds for thinking you have given a false one.

The Guardian - Opinion

Since this analysis only includes half of the data, we cannot ascertain whether the result represents the absence of a relationship at this short timescale or the lack of statistical power.

Nature

But if we cannot ascertain the truth then then we cannot ascertain the degree of truthlikeness of our theories either.

SEP

These surveys cannot ascertain that statement, but they were carried out to control the expected impact on VAP prevalence.

Annals of Intensive Care

Expert writing Tips

Best practice

Use "I cannot ascertain" in formal writing when you want to express that you are unable to determine something with certainty after investigation. It adds a level of precision and formality suitable for academic or professional contexts.

Common error

Avoid using "I cannot ascertain" in casual conversations or informal writing. Simpler phrases like "I don't know" or "I can't tell" are more appropriate and natural in less formal settings.

Linguistic Context

The phrase "I cannot ascertain" functions as a declarative statement expressing a lack of ability to determine or establish something definitively. According to Ludwig AI, this expression is grammatically correct and frequently employed in formal contexts.

Expression frequency: Very common

Frequent in

Science

63%

News & Media

25%

Formal & Business

3%

Less common in

Encyclopedias

3%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "I cannot ascertain" is a formal way of expressing an inability to determine or establish something with certainty. According to Ludwig AI, it is grammatically correct and commonly used in academic, scientific, and professional contexts. While highly appropriate for formal writing, it should be used judiciously in informal settings where simpler alternatives are more suitable. The primary contexts for this phrase are Science and News & Media, reflecting its use in research papers, reports, and objective analysis.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

I cannot determine

Replaces "ascertain" with "determine", focusing on the act of making a firm decision or conclusion.

I cannot establish

Substitutes "ascertain" with "establish", highlighting the difficulty in setting something on a firm or permanent basis.

I am unable to confirm

Uses "unable to confirm" instead of "cannot ascertain", shifting the focus to the lack of verification.

I am unable to verify

Similar to "confirm", this emphasizes the lack of ability to prove the truth or accuracy of something.

I cannot be sure

Replaces the formal "ascertain" with a more direct expression of uncertainty.

It is impossible for me to know

Expresses the inability to know something, highlighting the impossibility aspect.

I cannot figure out

Uses a more informal expression, meaning to find a solution or explanation.

I cannot understand

Focuses on the inability to grasp or comprehend something.

I have no way of knowing

Emphasizes the absence of a method or means to gain knowledge.

I fail to see

Indicates an inability to perceive or understand something, often implying disagreement or disbelief.

FAQs

How can I use "I cannot ascertain" in a sentence?

You can use "I cannot ascertain" to express an inability to determine something with certainty. For example, "After reviewing the data, I "cannot ascertain" the cause of the error."

What are some alternatives to "I cannot ascertain"?

Alternatives include "I cannot determine", "I am unable to confirm", or "I cannot figure out", depending on the specific context and desired level of formality. You can use alternatives like "I cannot determine", "I am unable to confirm", or "I cannot figure out depending on the context.

When is it appropriate to use "I cannot ascertain"?

"I cannot ascertain" is appropriate in formal writing, academic papers, and professional communications when expressing an inability to determine something with certainty after investigation. It's also fitting when needing to avoid informal phrasing.

What's the difference between "I cannot ascertain" and "I don't know"?

"I cannot ascertain" implies a more formal and considered inability to determine something, often after some investigation, whereas "I don't know" is a general expression of a lack of knowledge. "I don't know" is a simpler way to say it, but "I cannot ascertain" sounds more formal.