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I don't know
Definition of I don't know
1 —used to say that one does not have the information someone is asking for “What time does the library close?” “I don't know.”
2 informal —used to express disagreement, doubt, or uncertainty “I don't like that guy.” “Oh, I don't know, he's not really so bad.” She thinks we should go now, but I don't know. Maybe we should wait.
From the M-W Editors
Word by Word Definitions
: the 9th letter of the English alphabet
: a graphic representation of this letter
: a speech counterpart of orthographic i
: industrial
: initial
: intelligence
: imaginary unit
: do not
: does not
: a command or entreaty not to do something
: to perceive directly : have direct cognition of
: to have understanding of
: to recognize the nature of : discern
: knowledge
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