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
one thing is certain though
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "one thing is certain though" is correct and usable in written English.
You can use this phrase when you want to emphasize that one specific idea is undeniable or true. For example: "The outcome of the election is still unknown, but one thing is certain though: Change is coming."
✓ Grammatically correct
News & Media
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
33 human-written examples
One thing is certain, though: as there's so much money to be made in dealing the drug, each level of the supply chain adds some sort of white powder to the cocaine to maximise their profits.
News & Media
One thing is certain though, the lights on him are only likely to grow brighter.
News & Media
This article Oneginally appeared on VICE US.
News & Media
One thing is certain, though.
News & Media
One thing is certain, though: it is different.
News & Media
One thing is certain though: students will receive a new textbook very soon.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
26 human-written examples
One thing was certain though; if the match ended level after extra-time, then the seasons of both clubs would be decided on penalties, something that Lawrence thought was a complete nonsense.
News & Media
One thing is certain so far though; it would be the richest irony of all if the death of a former IRA gunman who killed to destroy the state of Northern Ireland ends up with unionists abandoning a political arrangement that has secured the union for the foreseeable future.
News & Media
Based on one of the screen shots, though, one thing is certain – Snaptune will do a good job pulling in meta data about the songs from Amazon and other sources (including user created data).
News & Media
Though one thing is certain: it's on!
News & Media
As the charges and suspicions filter through the city like the sticky summer air, though, one thing is certain -- mayhem is reaching ever higher levels, with murders, rapes and bus robberies becoming routine.
News & Media
Expert writing Tips
Best practice
Employ this phrase to add emphasis and conviction to your writing, especially when summarizing or concluding an argument.
Common error
While grammatically correct, "one thing is certain though" can sound overly formal or redundant in casual conversations. Consider using simpler alternatives like "for sure" or "definitely" in informal settings.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "one thing is certain though" functions as a transitional phrase used to introduce a statement or conclusion that the speaker or writer believes to be undeniably true. As Ludwig AI confirms, this phrase is perfectly grammatical and adds emphasis.
Frequent in
News & Media
95%
Formal & Business
3%
Science
2%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "one thing is certain though" is a grammatically correct and frequently used expression that serves to introduce a definitive statement. Ludwig AI confirms its validity and usefulness. It's most commonly found in news and media contexts, signaling a neutral register appropriate for professional communication. When writing, use this phrase to emphasize key points after acknowledging uncertainties, but be mindful of overuse in informal settings. Consider alternatives like "one thing is for sure" or "it's undeniable that" for varied expression.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
one thing is for sure
Replaces "certain" with "sure", maintaining the core meaning of inevitability but it's slightly less formal.
one thing is beyond doubt
Emphasizes the lack of doubt surrounding the statement, strengthening the sense of certainty.
it's a given that
Frames the statement as something already accepted as true, implying inevitability.
it's undeniable that
Highlights the impossibility of denying the truth of the statement, reinforcing certainty.
what's certain is that
Shifts the emphasis to the certainty itself, creating a slightly more formal tone.
there's no doubt that
Expresses a lack of doubt regarding the truth of the statement, conveying a strong sense of certainty.
it is certain that
More formal and direct, this alternative omits the phrase "one thing" for a more concise expression of certainty.
assuredly
A single-word adverb that conveys confidence and certainty, suitable for more concise writing.
undoubtedly
Similar to "assuredly", but perhaps slightly stronger in its assertion of certainty.
without a doubt
Emphasizes the absence of any uncertainty about the matter.
FAQs
How can I use "one thing is certain though" in a sentence?
You can use "one thing is certain though" to introduce a statement that you believe to be undeniably true, often after discussing other possibilities. For example: "The negotiations are complex, but "one thing is certain though": both parties want a resolution."
What phrases are similar to "one thing is certain though"?
Alternatives include "one thing is for sure", "it's undeniable that", and "there's no doubt that". The best choice depends on the specific context and desired tone.
Is it grammatically correct to say "one thing is certain though"?
Yes, "one thing is certain though" is grammatically correct. The phrase is commonly used to emphasize a point and introduce a definitive statement.
Can I use "one thing is certain though" in formal writing?
Yes, "one thing is certain though" is suitable for formal writing, especially in news articles, reports, and academic papers. It adds emphasis and conveys a sense of authority.
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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