I know; in “Was weiss ich?”: “What do I know?” or “How should I know?”
Jetzt weiss ich's.
Now I know.
— Caché (2005)
Weiss ich selbst, das war Campari!
I know that myself; that was Campari!
— Amarcord (1973)
"Aber jetzt weiss ich es."
But now I know.
— Der Postmann (1994)
Also wenn du nicht sagst, was los ist, weiss ich auch nicht, was wir machen.
Well, if you don't say what's going on, I really don't know what we're going to do.
Was weiss ich?
What do I know?
Weiss ich nicht.
I don't know.
Ihretwegen weiss ich das zu schätzen.
I appreciate it because of you.
Was weiss ich.
How should I know?