What does "i don't know" mean?

Used in response to a question or command in which the target person does not know the answer to or how to respond.

How do you pronounce "i don't know"?

Pronounced /[ɑ̈ɪ̯(ɾ)oʊ̯̃(ʔ)(t̚)noʊ̯]/.

/[ɑ̈ɪ̯(ɾ)oʊ̯̃(ʔ)(t̚)noʊ̯]/ intj

intj ·Rare ·Advanced level

Intj

1
Used in response to a question or command in which the target person does not know the answer to or how to respond.
"Mr. Schidtler: Does anybody here have any idea why "Inestine" was regarded as a great scientist? Kevin? Kevin: Oh, uh, I don't know."
2
Used to indicate that one is speculating (often used sarcastically when stating the obvious).
"Maybe you could, I don't know, directly talk to her about it instead of complaining to me for once?"
3
Used to express exasperation or incredulity about a given situation or person. UK
"The audacity of that lad... I don't know."
4
Used other than figuratively or idiomatically: see I, don't, know.
"I don't know why Blip just shuts off the power and then blames it on the weather."

"Mr. Schidtler: Does anybody here have any idea why "Inestine" was regarded as a great scientist? Kevin? Kevin: Oh, uh, I don't know."