for all (one) knows

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for all (one) knows

Said when one is uncertain or has limited details about something. I haven't talked to Marie in weeks, so, for all I know, she's not even coming to the dinner party tonight.
See also: all, know

for all I know

according to the information I have; I think; probably. (Usually implies uncertainty.) For all I know, the mayor has resigned already. She may have gone to town for all I know.
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for all someone knows

COMMON You use for all someone knows to say that person does not know the facts of a situation. For all we know, he may even not be in this country. She's had a miserable time staying faithful to someone who for all she knows might not be coming back.
See also: all, know, someone

for all someone knows

used to express the limited scope or extent of someone's information.
See also: all, know, someone

for all ˈI, ˈyou, etc. know

(spoken) used to emphasize that you somebody does not know something: She could be dead for all I know.
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for all I know

phr. as far as I know; I really don’t know. She came in late because she had an accident, for all I know.
See also: all, know