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for all I know

INFORMAL
This page is about the conversational phrase for all I know

Meaning

You can use this to emphasise how little you know by giving an example of what could be true.

For example

  • "When's Max getting here?"
    "I'm not sure. He could be here already for all I know."

  • "I wasn't sure if she really meant it. For all I know, she could've been joking."

Note:
Often used in the following patterns:
1. [Sentence 1] + [Sentence 2 + for all I know]
e.g. "I don't know where he is. He could be in Brazil for all I know."
2. [Sentence 1] + [For all I know, + Sentence 2]
e.g. "I don't know where he is. For all I know, he could be in Brazil."

Quick Quiz

Robert said, "For all I know, she could be a princess." He

a. knows she's a princess

b. knows a lot about her

c. knows little about her

Contributor: Matt Errey