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
are you sure
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "are you sure" is correct and usable in written English.
It can be used when seeking confirmation or expressing doubt about a statement or decision. Example: "Before we proceed with the plan, are you sure this is the best course of action?"
✓ Grammatically correct
News & Media
Academia
Science
Alternative expressions(20)
know for sure
surely
unquestionably yes
absolutely correct
Of course
yes exactly
I concur
that's exactly what i think
yes certainly
i am of the same mind
most definitely yes
That's correct
absolutely okay
most certainly yes
I'm of the same mind
Same here
i share your opinion
can you confirm
are you convinced
My thoughts exactly
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
48 human-written examples
FRANKEN: Are -- are you sure?
News & Media
Julia, are you sure?
News & Media
But are you sure?
News & Media
Well, are you sure? 'A.
Academia
And she says, are you sure?
Academia
"I said, 'Hospital, are you sure?
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
12 human-written examples
But you're not sure, are you?
News & Media
How sure are you of your answer?
You're sure you're brilliant.
News & Media
Be sure you have what you need.
Wiki
You are not sure.
Academia
Expert writing Tips
Best practice
Use "are you sure" to politely question someone's statement or decision when you suspect an error or oversight. It encourages them to double-check without directly accusing them of being wrong.
Common error
Avoid using "are you sure" sarcastically, as it can come across as condescending or dismissive. Sarcasm can undermine the original intention of seeking genuine clarification.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "are you sure" functions primarily as an interrogative expression used to seek confirmation or express doubt regarding a statement, decision, or piece of information. As Ludwig AI states, this phrase is both correct and usable in written English. The examples confirm its role in questioning the validity of claims or actions.
Frequent in
News & Media
42%
Academia
21%
Science
18%
Less common in
Wiki
6%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "are you sure" is a very common and grammatically correct way to seek confirmation or express doubt. As Ludwig AI confirms, it's a standard phrase applicable across many writing scenarios. Analysis of sources reveals its usage is prevalent in News & Media, Academic, and Scientific contexts. While alternatives like "are you certain" exist for more formal situations, "are you sure" remains a versatile and frequently used option. It’s important to be mindful of the tone when using this phrase, avoiding sarcasm to ensure clarity and politeness.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
are you certain
Replaces "sure" with "certain", emphasizing a higher degree of confidence.
are you positive
Similar to "are you certain", but slightly less formal.
do you really think so
Shifts from seeking confirmation to expressing doubt.
can you confirm
Focuses on obtaining a confirmation of information.
is that correct
Seeks verification of a statement's accuracy.
do you have any doubts
Inquires about the presence of uncertainty.
is there any chance you're mistaken
Suggests a possibility of error.
would you bet on it
Challenges the confidence level of a statement.
can you swear to it
Asks for a solemn assurance of truth.
what makes you say that
Questions the basis for a statement.
FAQs
How can I rephrase "are you sure" to sound more formal?
In formal settings, consider using phrases like "are you certain", "can you confirm?", or "do you have verification of that information?".
What's the difference between "are you sure" and "are you certain"?
While both phrases seek confirmation, "are you certain" often implies a higher degree of confidence or a more formal context than "are you sure".
When is it appropriate to use "are you sure" in a conversation?
It's appropriate to use "are you sure" when you want to politely question a statement or decision, particularly when you have reason to believe there might be an error or oversight.
What are some alternatives to "are you sure" that don't sound confrontational?
To avoid sounding confrontational, try using phrases like "do you really think so", "just to double-check", or "could you clarify that for me?"
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