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 so true
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is so true" is correct and usable in written English.
You can use it when you agree with something that someone else has said or written, to express that you strongly believe the statement to be true. For example: "I strive to do my best every day" - She said. "Yes, that is so true. We should all strive to do our best every day."
✓ Grammatically correct
News & Media
Academia
Alternative expressions(16)
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
15 human-written examples
OTHER PERSON: That is so true!
News & Media
"That is so true," the lawyer says, with emotion.
News & Media
I told her that it depended on the number of times I thought, "That is so true".
News & Media
Whether it's a game of cricket on an English green, an Indian maidan, a Caribbean beach, an Australian park, or right here at Lord's with the ancient pavilions looking on, I believe that is so true of cricket.
News & Media
Everyone says that he's the son of God, but I don't care one way or the other because he's just so cute!!! O.K., he's not hot like a gladiator or a centurion, but he's really sensitive and you can tell that he thinks about things and then goes, "Be nice to people," and I'm like, that is so true, and I wonder if he's seeing anyone!
News & Media
Fareed: That's so true, that is so true.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
45 human-written examples
I thought, God, that's so true!
News & Media
He transcends the "yes, that's so true, I agree!" into the "oh ew, no I'm not sure where this going …".
News & Media
NANCYFRANKLIN: @pulmyears Hahaaa, that's so true!
News & Media
Kyjah said, "That's so true".
News & Media
CROWLEY: That's so true.
News & Media
Expert writing Tips
Best practice
Use "that is so true" to express genuine agreement or affirmation in response to a statement or idea. It's more impactful when it reflects sincere concurrence.
Common error
While "that is so true" is a valid expression, avoid using it excessively in writing or conversation. Overuse can make your agreement seem insincere or unoriginal. Vary your responses with other expressions of agreement.
Source & Trust
87%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is so true" primarily functions as an interjection or an affirmation. As supported by Ludwig, it's used to express strong agreement with a previous statement. It shows the speaker's concurrence and validation of the statement's truthfulness.
Frequent in
News & Media
60%
Academia
20%
Wiki
10%
Less common in
Formal & Business
5%
Science
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "that is so true" is a phrase used to express emphatic agreement. Ludwig AI confirms its grammatical correctness and common usage across various contexts. While it's most prevalent in News & Media and Academia, its register is generally neutral to informal, so caution should be taken in more formal settings. To enhance your writing, remember that overuse can dilute its impact; thus, consider using alternative expressions to add variety and sophistication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that's definitely right
This alternative adds emphasis with "definitely", suggesting a stronger level of certainty.
that's absolutely correct
Using "absolutely" intensifies the agreement, indicating complete concurrence.
that's spot on
This idiom implies that the statement is precisely accurate.
you're completely right
Shifts the focus to the speaker being correct rather than the statement itself.
i couldn't agree more
Expresses strong agreement by stating the inability to agree any further.
that resonates deeply
This suggests the statement has a significant emotional or personal impact.
that rings true
This alternative conveys a sense of authenticity or genuineness.
i share that view
Expresses agreement by stating that the speaker has the same opinion.
that aligns with my thinking
This is a more formal way of expressing agreement, suggesting that the statement is consistent with the speaker's thoughts.
that's my understanding as well
This indicates agreement based on the speaker's own knowledge or perspective.
FAQs
How can I use "that is so true" in a sentence?
You can use "that is so true" to express strong agreement with a statement. For example, if someone says, "Honesty is the best policy", you could respond, "That is so true; it builds trust and strengthens relationships."
What's a more formal alternative to "that is so true"?
For a more formal setting, you could use alternatives like "that is absolutely correct" or "I couldn't agree more" to convey agreement in a professional manner.
Is it ever inappropriate to use "that is so true"?
While generally acceptable, "that is so true" might be inappropriate in highly formal or somber contexts where a more nuanced or respectful response is needed. Consider the tone and setting before using the phrase.
What's the difference between "that is so true" and "that's true"?
"That is so true" expresses a stronger level of agreement and enthusiasm than simply saying "that is true". The addition of "so" emphasizes the depth of your agreement.
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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
87%
Authority and reliability
4.6/5
Expert rating
Real-world application tested