I didn't read through this whole thread, because the discussion on page 2-3 was bothering me.
They were discussing if a straight line on a piece of paper, when bending the paper, is still a straight line.
FEers said no, REers said yes. So let's see what makes sense!
Now, FEers might be able to make some sense of what I'm about to say. Let's pretend there is a world of people called FLATLANDERS, that live on a 2D plane on a piece of paper. How they see things is quite different than what we see. A circle to them, appears as a line that appears as a dot, and slowly gets wider. Now, if you were to bend the piece of paper, it would have NO effect to them. You could bend the paper, twist and, and attach it, making a moebius strip, and they wouldn't know. Now, apply the same thing to OUR 3rd dimension. Take it and bend it through the 4th SPACIAL dimension. (To avoid talks about '4th dimension is time'). I know that we can't PHYSICALLY do this, but there is plenty of math for n dimensions. We wouldn't observe "bendy light" because it isn't there.