for all one knows

Prepositional phrase

Possibly or conceivably, given one's limited knowledge.

Japanese Meaning

限られた知識に基づく不確実性を示し、”もしかするとそうかもしれない”という意味です。

For all one knows, the missing documents are tucked away in the old attic.

誰が知っている限りでは、行方不明の書類は古い屋根裏にしまわれているかもしれない。

Sense（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.