# I'm sure

idiom

Source: https://englishreference.com/idiom/im-sure
Updated: 2026-08-10

## Meaning

Used as an interjection to indicate denial or contradiction in response to an assertion or accusation.

## Examples

- You think I broke the vase? I'm sure!
- He claimed I was the one who started the argument, but I'm sure.
- When the manager accused her of neglecting her duties, she retorted with a sharp, I'm sure, before walking out of the office.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.