Question
Updated on
5 Oct 2022
- Japanese
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English (US)
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Question about English (US)
What is the difference between I’m not sure and I don’t know ?Feel free to just provide example sentences.
What is the difference between I’m not sure and I don’t know ?Feel free to just provide example sentences.
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- English (US)
I’m not sure when she is going on vacation, but I think it’s next week.
I don’t know when he is going on vacation. You’ll have to ask someone else.
Sometimes these phrases are used interchangeably, but generally, "I’m not sure" expresses some doubt about information, while "I don’t know" is a definitive statement saying you do not have the information.
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- English (US)
"I don't know" says "I'm sure that I don't know."
"I'm not sure" says "I don't know if i know or not."
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Ann: What is the capital of Japan?
Bob: I don't know.
Carrie: I'm not sure.
Ann: Bob, what do you think it might be?
Bob: I have no idea.
Ann: Carrie, what do you think it might be?
Carrie: Um...Osaka?
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