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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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is doubtful

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "is doubtful" is correct and usable in written English.
It can be used to express uncertainty or skepticism about a statement, situation, or outcome. Example: "The outcome of the experiment is doubtful given the inconsistent results we have observed."

✓ Grammatically correct

News & Media

Science

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

55 human-written examples

Mr Piketty is doubtful.

News & Media

The Economist

On that Harari is doubtful.

News & Media

The New Yorker

Fontana is doubtful.

Bleasdale is doubtful.

But Twagirimana is doubtful.

News & Media

The Guardian

However it is doubtful.

News & Media

The New Yorker

A glutton, Antony is doubtful.

Danny Welbeck (muscle) is doubtful.

News & Media

Independent

So the future is doubtful.

But it is doubtful Agus will qualify.

News & Media

The Economist

Such an outcome in Syria is doubtful.

News & Media

The New York Times
Show more...

Expert writing Tips

Best practice

Use "is doubtful" when expressing uncertainty based on available evidence or reasonable assumptions. It's suitable for scenarios where a conclusive answer is lacking.

Common error

Avoid relying heavily on "is doubtful" in formal academic or scientific papers. Consider using stronger, more precise language to articulate your reservations or uncertainties.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

86%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "is doubtful" functions as an evaluative adjective phrase indicating a degree of uncertainty or skepticism. Ludwig AI confirms its role in expressing doubt, seen in examples where outcomes or statements are questioned.

Expression frequency: Very common

Frequent in

News & Media

49%

Science

22%

Encyclopedias

12%

Less common in

Wiki

6%

Formal & Business

6%

Social Media

0%

Ludwig's WRAP-UP

In summary, the phrase "is doubtful" is a versatile way to express uncertainty or skepticism, as affirmed by Ludwig AI. It functions as an adjective phrase and enjoys widespread use across diverse contexts like news, science, and encyclopedias. While grammatically correct and frequently employed, it's advisable to consider more precise alternatives in highly formal writing. Related phrases include "is questionable" and "is uncertain", offering subtle variations in meaning. Remember to use "is doubtful" when you want to express reservations based on available evidence or reasonable assumptions.

FAQs

How can I use "is doubtful" in a sentence?

You can use "is doubtful" to express uncertainty or skepticism about a statement, situation, or outcome. For example: "It "is doubtful" that the project will be completed on time."

What phrases can I use instead of "is doubtful"?

Alternatives include "is questionable", "is uncertain", or "is dubious", depending on the specific nuance you wish to convey.

When is it appropriate to use "is doubtful" in writing?

It's appropriate when expressing a degree of uncertainty or skepticism. However, in formal writing, consider whether a more precise term might better convey your meaning.

What is the difference between "is doubtful" and "is unlikely"?

"Is doubtful" suggests uncertainty based on evidence, while "is unlikely" implies a low probability. The choice depends on whether you're emphasizing the lack of certainty or the low chance of occurrence.

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Source & Trust

86%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Most frequent sentences: