Well, first, is there a human copier nearby? If not, you're probably Dave.
How about this: If you had stepped into a teleporter and pressed the button, how would you know that it killed you?
is there a human copier nearby?
This is exactly backwards.
I recognize a copier because it makes copies. That's how I know something is a copier.
If I need to know whether something is a copier before I can decide whether what it creates is a copy or not, there's something wrong with my thinking.
If you had stepped into a teleporter and pressed the button, how would you know that it killed you?
I wouldn't, naturally.
Of course, if Dave steps into an incinerator and presses the button, Dave also doesn't know that the incinerator killed Dave.
Dave is just...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.