This question already has an answer here:
- For all I know 4 answers
What are the best ways to translate
For all you know?
For all you know, she could be lying to you.
In response to a friend getting upset that her friend isn't picking up her phone, I respond, "For all you know, something could have happened."
A neighbor sends us some vegetables and I tell my wife, "We better wash them first, for all we know, they could be covered in pesticide"