for all one knows

English

Prepositional phrase

for all one knows

1. Possibly or conceivably, given one's limited knowledge.

   I haven't seen her for weeks. For all I know, she's moved to another country.

   • 1980 March 7, Billy Joel, “You May Be Right”, in Glass Houses‎^[1]:

     Turn out the light
     Don't try to save me
     You may be wrong for all I know
     But you may be right