I'm sure
Used as an interjection to indicate denial or contradiction in response to an assertion or accusation.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“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.”
- 01
I'm not being funny
Used as a softening preface to a statement that might be taken as offensive or malicious.
- 02
I'm not telling you
Used to express that someone doesn't need to know something, typically because it is a secret (sometimes used as a way to attempt to hide someone's wrongdoing); may also be used when someone tries to ask for answers while doing an assignment or examination, or private or confidential information, including passwords.
- 03
I'm not the one
A warning to an individual who has greatly offended one's dignity or has acted or spoken insolently.
- 04
if I'm honest
to be honest
- 05
if I'm not there, start without me
I am not interested in the event and do not plan to attend.
- 06
sure enough
Just as one would expect.
- 07
to be sure
Certainly, undoubtedly, admittedly, surely.
Last updated August 10, 2026