have not demonstrated

USAGE SUMMARY

The phrase "have not demonstrated" is correct and usable in written English.
You can use it when indicating that something has not been shown or proven, often in a formal or academic context. Example: "The researchers have not demonstrated a clear link between the two variables in their study."

✓ Grammatically correct

Science

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

We have not demonstrated that we don't have a crust, we have not demonstrated that we have a crust.

The Guardian

However, some studies have not demonstrated this inverse association.

Beer in Health and Disease Prevention

"They have not demonstrated any genuine concern for the victim".

The New York Times

We have a group of nine who have not demonstrated any symptoms.

Harvard University

Furthermore, well-designed trials have not demonstrated adequate clinical efficacy for these endoscopic devices.

Techniques in Gastrointestinal Endoscopy

Many of these clinical intervention trials have not demonstrated significantly improved health for these persons.

Journal of Pediatric Health Care

Nerve conduction studies have not demonstrated within- and between-group differences.

Journal of Diabetes and its Complications

Records show that several of her clinics have not demonstrated that they meet federal rules for doctors' training.

The New York Times

What the claims about the effects of "hypersexualisation" have not demonstrated is a cause-and-effect relationship.

The Guardian - Opinion

Researchers have not demonstrated that ability in other species, but Dr. Davis said migratory mammals or birds could have it.

The New York Times - Science

The "local governments" that you claim have not demonstrated a need for water are two Indian tribes.

The New York Times

Expert writing Tips

Best practice

When using "have not demonstrated", ensure that the context clearly indicates what evidence or proof is lacking. Specify the criteria for demonstration if necessary.

Common error

Avoid using "have not demonstrated" to imply absolute certainty of something being false. It simply indicates that sufficient evidence hasn't been presented, not that it's impossible.

Linguistic Context

The phrase "have not demonstrated" primarily functions as a verb phrase used to indicate a lack of evidence or proof for a particular claim or assertion. This aligns with Ludwig AI's assessment of the phrase's correctness and usability, as evidenced by the numerous examples.

Expression frequency: Very common

Frequent in

Science

47%

News & Media

35%

Academia

10%

Less common in

Wiki

2%

Formal & Business

0%

Encyclopedias

0%

Ludwig's WRAP-UP

In summary, "have not demonstrated" is a grammatically sound and frequently used phrase, particularly in scientific, academic, and news contexts. As Ludwig AI confirms, it accurately conveys a lack of proof or evidence. When using this phrase, ensure clarity by specifying what has not been demonstrated and avoid implying absolute certainty. Alternatives like "have not proven" or "failed to show" can offer subtle variations in meaning. Remember that while widely accepted, this expression should be used responsibly to avoid overstating the absence of evidence.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

have not proven

Replaces "demonstrated" with "proven", focusing on the lack of conclusive evidence.

have failed to show

Emphasizes the failure to present or display evidence.

have not established

Highlights the lack of a solid foundation or confirmation.

have not substantiated

Focuses on the absence of supporting evidence to validate a claim.

have not validated

Stresses the lack of confirmation or verification of something.

have not confirmed

Indicates that something has not been verified or made certain.

have not evidenced

Highlights the lack of visible or apparent proof.

have not exhibited

Focuses on the absence of displayed qualities or behaviors.

have not displayed

Emphasizes the lack of shown or presented information.

have not revealed

Indicates that something has not been disclosed or made known.

FAQs

How can I use "have not demonstrated" in a sentence?

Use "have not demonstrated" to indicate a lack of proof or evidence. For example, "Researchers "have not demonstrated" a direct link between the drug and the reported side effects."

What are some alternatives to "have not demonstrated"?

Alternatives include "have not proven", "failed to show", or "have not established" depending on the context.

Is it more formal to say "have not demonstrated" or "didn't show"?

"Have not demonstrated" is generally more formal and suitable for academic or professional writing, while "didn't show" is more informal and appropriate for casual conversation.

What's the difference between "have not demonstrated" and "have not proven"?

While similar, ""have not demonstrated"" implies a lack of visible or apparent evidence, whereas ""have not proven"" focuses on the absence of conclusive proof or validation.