Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
I deeply doubt
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "I deeply doubt" is correct and usable in written English.
You can use it when expressing strong skepticism or disbelief about a statement or situation. Example: "I deeply doubt that the project will be completed on time given the current delays."
✓ Grammatically correct
News & Media
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
2 human-written examples
Maybe you read (though for some reason I deeply doubt it) my article on the absurdity of #WhiteGirlsRock.
News & Media
I deeply doubt that the direct comparison of sexual and asexual populations in the evolutionary aspect is an eligible approach.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
This makes me deeply doubt his avowed concern for our veterans or that he has any sense of their sufferings.
News & Media
Tommy Lee, who is sixty-two, isometimeses troubled or cast down or threatened in his long film repertory but never nerdy or deeply doubting.
News & Media
It's deeply contaminated, deeply undermined, deeply doubting its own existence".
News & Media
Franklin would have been deeply saddened, but I doubt he would have been surprised, by the events in Ferguson, Staten Island, Charleston, Cleveland, Baltimore.
News & Media
I don't doubt how deeply Ashley felt her mother's love when holding these talismans.
News & Media
Watch me cover my back and say hey, I've read two JG Ballard novels, I don't doubt the presence of deeply dark shit in high places.
News & Media
I don't doubt that Gordon feels deeply about modern history and wants to makes us feel its horrors.
News & Media
I doubt Marvel thought this deeply when they cast a black man to play a God who could see in magnified clarity what others could not, and who always stood on guard even when it was Thor whom Asgardians saw as their true protector.
News & Media
I slightly doubt it.
News & Media
Expert writing Tips
Best practice
Use "I deeply doubt" to express strong skepticism, especially when addressing statements that seem improbable or lack evidence.
Common error
Avoid using "I deeply doubt" in casual conversation where a simpler phrase like "I doubt it" would suffice. The adverb "deeply" adds intensity that can sound overly dramatic in informal settings.
Source & Trust
88%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
Expressing disbelief or strong skepticism. "I deeply doubt" functions as a declarative statement, conveying the speaker's strong reservations or lack of confidence in a particular claim or situation. Ludwig AI provides examples demonstrating its use in various contexts to indicate disagreement or uncertainty.
Frequent in
News & Media
60%
Science
25%
Formal & Business
15%
Less common in
Wiki
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "I deeply doubt" is a grammatically correct way to express significant skepticism or disbelief. As shown by Ludwig, it appears in various contexts, particularly in news and media and scientific publications. While "I deeply doubt" is considered rare in everyday conversation, it effectively conveys a strong sense of doubt when needed. To avoid overuse, consider using alternatives like "I strongly doubt" or "I highly doubt" for similar effect. The adverb "deeply" should be used judiciously to avoid sounding overly dramatic in more casual settings.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
I strongly doubt
Indicates a firm level of skepticism, similar to "I deeply doubt" but with a slightly different emphasis.
I seriously doubt
Expresses significant doubt, focusing on the gravity of the disbelief.
I highly doubt
Implies a considerable degree of uncertainty or disbelief.
I severely doubt
Conveys a strong sense of disbelief, suggesting that the speaker finds the idea very unlikely.
I greatly doubt
Similar to "I deeply doubt", emphasizing the magnitude of the speaker's skepticism.
I find that hard to believe
Shifts the focus to the speaker's difficulty in accepting the statement as true.
I'm skeptical of that
Expresses doubt by highlighting the speaker's skeptical attitude.
I'm not convinced
Indicates a lack of persuasion, suggesting the speaker remains doubtful.
That seems unlikely to me
Expresses doubt by focusing on the perceived improbability of the statement.
I question that
Expresses disbelief by directly questioning the validity of the statement.
FAQs
How can I use "I deeply doubt" in a sentence?
You can use "I deeply doubt" to express strong skepticism or disbelief about something. For example, "I deeply doubt that the company will meet its sales targets this quarter."
What phrases are similar to "I deeply doubt"?
Alternatives include "I strongly doubt", "I highly doubt", or "I'm skeptical of that", each conveying a similar sense of disbelief.
Is it appropriate to use "I deeply doubt" in formal writing?
Yes, "I deeply doubt" is appropriate for formal writing when you want to express strong skepticism. However, consider the context and whether a more nuanced expression might be more suitable.
What's the difference between "I doubt it" and "I deeply doubt"?
"I doubt it" is a general expression of skepticism, while "I deeply doubt" intensifies the feeling of disbelief. The latter is stronger and more emphatic than the former.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.1/5
Expert rating
Real-world application tested