But that's not the point. The unawareness of those men does not justify you deliberately choosing to kill them. Nothing really does, except that you have to make a choice between them and the child. Also, you think choosing to kill a child is morally objectionable, but not ten men?
The point is that you have to kill either nine or ten men or a child, no matter the circumstance. I wouldn't put any other factors into the equation about the circumstance because it's supposed to be an ethical dilemma rather than a circumstantial dilemma.
What's the point of the whole story? IRL there's plenty of ways to make everyone live.
Why not just say "would you rather kill 9 men or 1 child"?
Oh yeah, 1 v 9? I kill 1.
I will save the kid, because I know for sure that the kid would be alive when I can't guarantee that all/one of the men will make out, I mean 90%, um kid it is.