In a small bubble surrounded by nothing (or not surrounded by anything), no matter which way you looked you would see the back of your head. If you threw something away from you, it would hit you in the back.

He brings the example of a spaceship flying into space and asks what would happen if it went on and on. Is there an end point or does one eventually loop back to the starting point? These possibilities seem rather implausible. — spirit-salamander

If there is nothing beyond, why wouldn't it come back to its beginning?

Using only physical instruments, we may never know if physicalism is false.

So would you let the person die and take the money?

Why can't that happen in a determined universe?

How would an undetermined universe change your concern? Wouldn't statements still be utterances and so on?

How is everyone correct in a determined universe? Why can't there still be truths and falsehoods?

If the universe has actually expanded from a point with itself being the center, then the center has become the whole universe. The center is everywhere.

Ah thanks for the links. I will watch and come back to this.

To answer this, ask yourself, if destroying you hurts, would you feel the pain or would your copy?

There are 4 dimensions with time being only one of them. You would need another temporal dimension for time to curve into.

It's like asking what the shape of a line is situated from East to West.

As far as science is concerned, time is a dimension. It can only have two opposite directions.