one thing is for certain

USAGE SUMMARY

"one thing is for certain" is a valid phrase that is often used in both spoken and written English.
It is typically used to emphasize the absolute certainty of a statement or opinion. For example, you might say, "One thing is for certain: I'm not going to change my mind on this issue."

✓ Grammatically correct

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

But one thing is for certain: Watching Netflix on the Apple Watch's tiny screen would suck.

TechCrunch

The variables are endless but one thing is for certain: fashion is on the frontline of globalization.

Huffington Post

One thing is for certain: society's reliance on human judgment, unaided by computers, is going to decrease.

Harvard Business Review

One thing is for certain: we are not short on challenges.

Huffington Post

While campaign plans are unclear, one thing is for certain: All eyes will be on City Hall come August 12.

Huffington Post

One thing is for certain: the QX56 will escalate pressure on the Escalade.

Forbes

One thing is for certain: It won't have many more miles on it by then.

The New York Times

One thing is for certain.

Independent

One thing is for certain, though.

The Guardian - Travel

Only time will tell, but one thing is for certain.

The Guardian - Sport

One thing is for certain, however: Hang gliding has nothing to do with real estate.

The New York Times

Expert writing Tips

Best practice

Use "one thing is for certain" to introduce a key point or conclusion in your writing or speech to add emphasis and clarity.

Common error

Avoid using "one thing is for certain" excessively in a single piece of writing, as it can diminish its impact and make your tone sound repetitive.

Linguistic Context

The phrase "one thing is for certain" functions as an emphatic introductory phrase. As Ludwig AI indicates, it's used to highlight the indubitable truth of the statement that follows. It serves to draw the reader's or listener's attention to a key point or conclusion.

Expression frequency: Very common

Frequent in

News & Media

65%

Academia

20%

Formal & Business

10%

Less common in

Science

2%

Encyclopedias

1%

Wiki

2%

Ludwig's WRAP-UP

In summary, "one thing is for certain" is a prevalent phrase employed to underscore the certainty of a statement. As Ludwig AI confirms, it's grammatically sound and frequently encountered across diverse sources, especially in News & Media. Its purpose is to assert conviction and dispel doubt, while maintaining a neutral tone suitable for various registers. When writing, use it to emphasize key points but avoid overuse. Alternatives like "one thing is sure" or "without a doubt" can provide variation. Overall, it's a valuable tool for assertive communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

one thing is sure

Replaces "certain" with "sure", maintaining the core meaning but with a slightly less formal tone.

without a doubt

Highlights the absence of any uncertainty or question regarding the stated fact.

it is certain that

Formal rephrasing using a more direct and assertive construction.

beyond any doubt

Emphasizes the complete absence of uncertainty.

it's a given

Conveys that something is definitely going to happen or is undeniably true.

there's no question that

Introduces a statement as something definitively true, leaving no room for doubt.

you can be sure that

Directly assures the listener or reader of the certainty of a statement.

it's undeniable

Emphasizes the incontrovertible nature of a statement, focusing on its irrefutability.

it's guaranteed

Implies a strong assurance or warranty regarding the truth or occurrence of something.

it goes without saying

Indicates that something is so obvious that it doesn't need to be explicitly stated.

FAQs

How can I use "one thing is for certain" in a sentence?

Use "one thing is for certain" to emphasize a point that you believe to be undeniably true. For example, "One thing is for certain: the project needs more funding to succeed."

What phrases can I use instead of "one thing is for certain"?

You can use alternatives like "one thing is sure", "without a doubt", or "it's undeniable" to convey a similar sense of certainty.

Is it correct to say "one thing's for certain"?

Yes, "one thing's for certain" is a grammatically correct contraction of "one thing is for certain". Both phrases are widely accepted and convey the same meaning.

What's the difference between "one thing is for certain" and "one thing is sure"?

While both phrases convey certainty, "one thing is for certain" often carries a slightly stronger emphasis than "one thing is sure". The difference is subtle, and they are often interchangeable.