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
that is false
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is false" is correct and usable in written English.
You can use it to indicate that a statement or claim is not true or accurate. Example: "The assertion that the earth is flat is incorrect; in fact, that is false."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
that is a misrepresentation
which is different
which is strange
which is not possible
which is wonderful
which is not ideal
that's right
that much is certain
which is hard
which is rare
that's not right
which is real
that is incorrect
which is not applicable
which is correct
which is applicable
which is accurate
that's untrue
which is depressing
that holds true
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
55 human-written examples
"Find the part that is false".
News & Media
They want an image that is false, not the truth".
News & Media
There is quite a lot that is false or comical in the conservatives' claims, as you'd expect of any propaganda.
News & Media
Consider this proposed requirement: "Affidavits and sworn statements shall not contain information that is false or unsubstantiated".
News & Media
If the current landlord says something about the writer that is false or defamatory, the writer can sue for damages.
News & Media
"There's this e-mail that he didn't shake hands with the troops," Mr. Stickles said of a rumor that is false.
News & Media
"There is no question that his campaign is putting out information that is false and deceptive," Romney told CNN's Jim Acosta.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
4 human-written examples
It was a story that was false".
News & Media
But in these cases, that was false".
News & Media
Except she provided information that was false.
News & Media
(Footnote – of course, that's false).
News & Media
Expert writing Tips
Best practice
When using "that is false", ensure you can provide evidence or reasoning to support your claim. Simply stating it is not enough; explain why.
Common error
Avoid simply stating "that is false" without offering an explanation or alternative perspective. This can come across as dismissive and unhelpful to the reader. Instead, explain why the statement is inaccurate or misleading.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is false" functions as a declarative statement used to express disagreement or contradiction. As Ludwig AI shows, it directly negates a previous assertion, indicating it's not in accordance with facts. It serves to correct misinformation or challenge an incorrect claim.
Frequent in
News & Media
75%
Science
15%
Formal & Business
3%
Less common in
Encyclopedias
2%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "that is false" is a direct and frequently used phrase to contradict a statement. As shown by Ludwig AI, it is grammatically correct and appears most commonly in news and media contexts. When using this phrase, it's important to provide context and evidence to support your claim. Alternatives include "that is incorrect" or "that is untrue". Be mindful of avoiding overuse without explanation to ensure clear and helpful communication. The high frequency and clear grammatical function underscore its utility in formal and informal discourse.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that's incorrect
Uses the contraction "that's" and replaces "false" with "incorrect", offering a slightly more informal tone.
that's untrue
Uses the contraction "that's" and replaces "false" with "untrue", maintaining a similar level of formality.
that's simply not true
Adds emphasis with "simply", reinforcing the denial of truth.
that's a lie
Replaces "false" with "a lie", indicating a stronger level of disbelief or accusation.
that is not the truth
Rephrases the statement to emphasize the absence of truth, providing a more descriptive alternative.
that's a fabrication
Suggests that the statement is completely invented or made up.
that is pure fiction
Emphasizes the unreal or imaginary nature of the statement.
that is a misrepresentation
Indicates that the statement distorts the truth, suggesting a more subtle form of falsehood.
that statement is erroneous
Replaces "false" with "erroneous", indicating a mistake or error in the statement.
that claim is unfounded
Shifts focus to the "claim" being without basis or evidence.
FAQs
How can I use "that is false" in a sentence?
Use "that is false" to directly contradict a statement you believe to be untrue. For example, "The claim that vaccines cause autism is dangerous, and "that is false"."
What are some alternatives to saying "that is false"?
You can use alternatives like "that is incorrect", "that is untrue", or "that is a lie", depending on the context and your desired level of emphasis.
Is it better to say "that is false" or "that is incorrect"?
Both "that is false" and "that is incorrect" are grammatically correct. "That is incorrect" might be perceived as slightly more polite or formal, while "that is false" is a more direct contradiction.
What's the difference between "that is false" and "that is misleading"?
"That is false" means the statement is simply not true. "That is misleading" means the statement might contain some truth but is presented in a way that could lead to a wrong conclusion.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested