[mitsur]

Let's just assume for the moment, before we all start arguing if time travel is/will be possible that time travel IS possible. Ok, I'll use the example I used the last time I had this topic.

You are sitting on the counch, eating whatever you usually eat, when suddenly the power is vut. A robber breaks in through the window, and sneaks up behind you. He puts a gun to your head, and is about to kill you. Just then a rock flies through the window, hitting the robber on the head, and incapacitating him. When you call the police, you feel a strange sensation, and when you blink, you are in front of your house ten minutes ago. You then see the power go off, and, realizing something, grab a rock and throw it through the window just as the robber from before puts a gun to yourself. When you see yourself disappear, you quickly take yourself's place.

The question is, if you had gone back in time, would the rock had still hit the robber? Or would you be dead?

What do you guys think of time travel and/or time paradoxes?