im not sure either

USAGE SUMMARY

The phrase "im not sure either" is not correct in written English due to the lack of capitalization and punctuation.
You can use it in informal contexts when expressing uncertainty, especially in response to someone else's uncertainty. Example: "I asked if we would finish the project on time, and he said he wasn't sure. I replied, 'I'm not sure either.'"

⚠ May contain grammatical issues

News & Media

Science

Human-verified similar examples from authoritative sources

Similar Expressions

60 human-written examples

im not sure?

TechCrunch

Now im not sure if the interview is correct.

Huffington Post

I'm not sure, either.

The New Yorker

At first, he's not sure either.

The New York Times

LC: Not sure either.

TechCrunch

Im still not sure Im wrong.

Forbes

Sarah wasn't sure either.

The New York Times - Magazine

Then again, HotJobs isn't sure, either.

Forbes

D.W.: I wasn't sure either.

Science Magazine

I'm not sure I do, either.

The New Yorker

I'm not sure I am, either.

The New Yorker

Expert writing Tips

Best practice

In formal writing, always capitalize "I'm" and ensure proper punctuation for clarity. "I'm not sure, either" is grammatically sound.

Common error

While "im not sure either" might be acceptable in very informal contexts, avoid using it in professional emails or academic papers. Always use the correct capitalization and punctuation: "I'm not sure either."

Linguistic Context

The phrase "im not sure either" (corrected to "I'm not sure either") functions as an expression of uncertainty, often used in response to a previous statement indicating a lack of certainty. Ludwig AI indicates that proper capitalization and punctuation are required for grammatical correctness.

Expression frequency: Missing

Frequent in

News & Media

45%

Science

35%

Formal & Business

20%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, "im not sure either" is a phrase used to express uncertainty, often echoing a previous statement of doubt. However, as Ludwig AI highlights, its uncorrected form lacks capitalization and proper punctuation, rendering it grammatically incorrect for formal writing. While common in informal contexts like casual conversations, professional or academic settings benefit from more polished alternatives such as "I am also uncertain" or "I share your uncertainty". The phrase appears across diverse sources, from news outlets to scientific publications, yet maintaining grammatical precision enhances clarity and credibility in formal communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

I'm also unsure

Replaces "not sure" with "unsure" and adds "also" to emphasize agreement.

I'm not certain either

Substitutes "sure" with "certain", maintaining the negative and additive "either".

I'm doubtful as well

Uses "doubtful" instead of "sure" to express uncertainty, with "as well" for agreement.

I have my doubts too

Expresses uncertainty through "having doubts", adding "too" to show agreement.

I'm of the same mind

Indicates agreement in thought or opinion, implying shared uncertainty.

I share your uncertainty

Directly states a shared feeling of uncertainty with the other person.

I couldn't say for sure

Emphasizes the inability to confirm something with certainty.

I'm in the dark as well

Uses a metaphor to indicate a lack of knowledge or understanding, similar to uncertainty.

I haven't a clue either

Emphasizes a complete lack of knowledge or understanding.

Your guess is as good as mine

Indicates that the speaker has no more information than the listener.

FAQs

How can I properly use "im not sure either" in a sentence?

Always capitalize "I'm" and include punctuation: "I'm not sure either." This is especially important in formal writing.

What's a more formal way to say "im not sure either"?

Consider alternatives such as "I am also uncertain" or "I share your uncertainty" for professional contexts.

Is there a difference between "I'm not sure either" and "I'm not sure, too"?

"I'm not sure either" is generally used to agree with a previous statement of uncertainty. "I'm not sure, too" can imply an additional, separate uncertainty.

What can I say instead of "I'm not sure"?

You can use phrases like "I am uncertain", "I don't know", or "I can't say for sure" depending on the context.