Note: I am not a native English speaker.
The surprise rules state (emphasis mine):
If you're surprised, you can't move or take an action on your first turn of the combat, and you can't take a reaction until that turn ends.
Does the quoted rule means that a surprised creature can either move OR act, but not both? Or does it mean a surprised creature can neither move NOR act?
I used to think the latter interpretation is correct (or at least that this is the intended meaning), but I had an argument about this. The German Player's Handbook supports my thought, but I already had found several translation errors therein, so I don't really want to rely on the rules there.