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
thoroughly mistaken
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "thoroughly mistaken" is correct and usable in written English.
It can be used to describe someone who is completely wrong about a particular belief or idea. Example: "After reviewing the evidence, it became clear that he was thoroughly mistaken about the outcome of the experiment."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
completely wrong
entirely incorrect
utterly incorrect
dead wrong
patently false
grossly inaccurate
seriously flawed
wide of the mark
utterly missed
woefully inadequate
entirely unnoticed
absolutely missed
thoroughly lost
completely overlooked
totally missed
further missed
closely missed
thoroughly missed
genuinely missed
seriously underestimated
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
1 human-written examples
She says the court is thoroughly mistaken, and that the person who had her charged ought to be charged instead.The ECCC has already secured convictions against three of the prominent Khmer Rouge figures who came before it.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
In it, Arnauld presents his own position on the nature of ideas, which was described above, and argues that Malebranche's view that we see all things (or at least all bodily things) in God and by means of God's ideas is not only mistaken, but thoroughly confused and wrong-headed.
Science
Mr. Pataki said yesterday that the committee would work to find the causes of this mistaken conviction and of others in New York, and would make proposals to use forensic DNA more thoroughly in future investigations.
News & Media
If I am not mistaken, part of the Yankees' charter, registered with Major League Baseball, guarantees that the Yankees will spend money, stockpile talent and thoroughly grind the rest of baseball into the pavement.
News & Media
I think this is a classic case of digital dualism: the mistaken idea that our lives are divided into a phoney online experience and an authentic offline world, when both are thoroughly enmeshed.
News & Media
In a preamble to their statement of purpose, the committees said they would look thoroughly into the mistakes and lapses before Sept. 11 and far beyond -- in memory of the victims of the attacks.
News & Media
Erase any mistakes thoroughly so they don't show up.
Wiki
Music journalist Mark Coleman, writing in The Rolling Stone Album Guide, said that the album was "so coherent and smooth that you could mistake it for a suite if it wasn't also so thoroughly down and dirty".
Wiki
As they bump, grind and thoroughly enjoy themselves among their adoring crowd ("Ladies from the easties and from the westies / Trying to molest these beautiful testes"), no one will mistake them for failures.
News & Media
And, although he is a supporter of the euro and of European integration, he describes thoroughly the hugely expensive mistakes made by Europe's leaders.The biggest error was to misunderstand the underlying causes of the crisis.
News & Media
He's certainly a tool, his fumbling mistakes and misrepresentations thoroughly mucking up his committee's investigation, probably beyond redemption.
News & Media
Expert writing Tips
Best practice
Use "thoroughly mistaken" to convey a strong sense of disagreement or to emphasize the extent of someone's error. Ensure the context supports such a firm assertion.
Common error
Avoid using "thoroughly mistaken" excessively, as it can sound overly critical or condescending. Opt for milder alternatives like "misinformed" or "incorrect" in less contentious situations.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "thoroughly mistaken" functions as a descriptive adjective phrase, modifying a noun or pronoun to express a high degree of error or misunderstanding. Ludwig indicates that it is a valid and usable English expression.
Frequent in
News & Media
50%
Science
50%
Formal & Business
0%
Less common in
Wiki
0%
Reference
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "thoroughly mistaken" is a valid and usable English phrase that functions as a descriptive adjective. Ludwig confirms its correctness and indicates its use in expressing a strong disagreement or highlighting a significant error. While the phrase appears across various contexts, like in news, its register is generally neutral to formal, and caution should be exercised to avoid overuse to not sound overly critical. Consider alternative phrases, such as "completely wrong" or "utterly incorrect", depending on the specific nuance you want to convey.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
completely wrong
Implies a total absence of correctness.
utterly incorrect
Emphasizes the complete lack of accuracy.
entirely erroneous
Highlights the presence of error throughout.
totally misguided
Focuses on the misdirection of thought or action.
dead wrong
An informal expression indicating absolute incorrectness.
patently false
Suggests that the incorrectness is obvious and easily detected.
grossly inaccurate
Indicates a significant level of inaccuracy.
seriously flawed
Points to fundamental problems leading to incorrectness.
fundamentally unsound
Suggests the base assumptions or principles are flawed.
wide of the mark
Implies a significant deviation from the correct or intended target.
FAQs
How can I use "thoroughly mistaken" in a sentence?
You can use "thoroughly mistaken" to express strong disagreement, like: "She is "thoroughly mistaken" about the facts of the case."
What's the difference between "thoroughly mistaken" and "slightly mistaken"?
"Thoroughly mistaken" implies a complete misunderstanding, while "slightly mistaken" suggests a minor error. "Thoroughly mistaken" conveys a much stronger sense of disagreement.
What can I say instead of "thoroughly mistaken"?
Alternatives include "completely wrong", "utterly incorrect", or "entirely erroneous", depending on the context.
Is it appropriate to use "thoroughly mistaken" in formal writing?
Yes, "thoroughly mistaken" can be used in formal writing, but consider the tone and audience. If a less confrontational approach is needed, consider alternatives like "incorrect" or "inaccurate".
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested