I sincerely doubt

USAGE SUMMARY

The phrase "I sincerely doubt" is correct and usable in written English.
You can use it when expressing a strong belief that something is unlikely to be true or to happen. Example: "I sincerely doubt that the project will be completed on time given the current delays."

✓ Grammatically correct

News & Media

Tech

Opinion

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

But I sincerely doubt it.

The New York Times

"I sincerely doubt it," Niccolini said.

The New Yorker

"I sincerely doubt you'll see anything like last game".

The New York Times - Sports

"I sincerely doubt that Microsoft wants to get into this business".

The New York Times - Tech

I sincerely doubt that he is going to change his position for any reason.

Independent

He says that if God created life — "which I sincerely doubt" — he didn't think it through.

The New Yorker

"I sincerely doubt it would be in the U.S.," he said.

The New York Times

"At one of the two meeting points?" "I sincerely doubt it," I said.

The New Yorker

I sincerely doubt the Diamondback fans treated Mariano Rivera the same way.

The New York Times - Sports

If we have the same problem this weekend it'll be very interesting, but I sincerely doubt it".

Independent

Guillermo Ochoa (Mexico) This guy arrived at the World Cup unemployed but I sincerely doubt that it will remain that way.

The Guardian - Sport

Expert writing Tips

Best practice

When using "I sincerely doubt", follow it with a clear explanation of why you hold that doubt. Providing context strengthens your position and makes your skepticism more persuasive.

Common error

While effective, relying too heavily on "I sincerely doubt" can make your writing sound repetitive. Vary your expressions of skepticism with alternatives like "I question whether" or "It seems unlikely" for a more engaging style.

Linguistic Context

The phrase "I sincerely doubt" functions as a declarative statement expressing disbelief or skepticism. It introduces a subjective assessment, suggesting that the speaker finds something unlikely or questionable, as evidenced by Ludwig's examples.

Expression frequency: Very common

Frequent in

News & Media

60%

Tech

20%

Opinion

10%

Less common in

Wiki

3%

Science

3%

Formal & Business

4%

Ludwig's WRAP-UP

In summary, "I sincerely doubt" is a widely used and grammatically correct phrase that allows you to convey disbelief or skepticism in a polite and measured way. As Ludwig AI confirms, it functions as a declarative statement with the primary purpose of expressing disagreement or a lack of confidence. While versatile, it's important to avoid overuse and consider alternative expressions like "I highly doubt" or "I seriously question" to maintain a dynamic writing style. The phrase is most commonly found in news, tech, and opinion contexts and is generally considered to have a neutral register.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

I highly doubt

Emphasizes the extent of doubt, suggesting a strong disbelief.

I'm rather doubtful

Adds a touch of formality to the expression of doubt.

I seriously question

Shifts the focus to questioning the validity of something.

I'm not convinced

Expresses a lack of persuasion or belief.

I find it hard to believe

Highlights the difficulty in accepting a statement or claim.

I'm inclined to disbelieve

More formal expression indicating a leaning towards disbelief.

I'm skeptical

A more concise and direct expression of doubt.

I have my doubts

Indicates uncertainty and a lack of conviction.

It's unlikely

Focuses on the low probability of something occurring.

I don't think so

A simple and informal way to express disagreement and doubt.

FAQs

How can I use "I sincerely doubt" in a sentence?

Use "I sincerely doubt" to express a strong feeling that something is not true or not likely to happen. Example: "I sincerely doubt that the project will be completed on time given the current delays."

What are some alternatives to "I sincerely doubt"?

You can use alternatives like "I highly doubt", "I seriously question", or "I find it hard to believe" depending on the context.

Is "I sincerely doubt" formal or informal?

"I sincerely doubt" is generally considered more formal than alternatives like "I don't think so" but less formal than "I am inclined to disbelieve". It's suitable for professional and academic settings.

What is the difference between "I doubt" and "I sincerely doubt"?

Adding "sincerely" intensifies the expression of doubt. While "I doubt" expresses uncertainty, "I sincerely doubt" conveys a stronger belief that something is unlikely or untrue.