True, but still the Q remains; when flattening any object to the point that it is flattened completely and not in two layers (over- and under-side) the void of what was the underside must leave a "nothing". And a nothing can not exist.
Okay, you've lost me again. What do you mean by "not in two layers"?
Well, imagine you take a soft, hollow ball. Squeeze this so that it is seemingly flat. You will still have an over- and under-side (the side you could clearly see with you eyes, and the rear-side that you would have to imagine being there).
If I then backtrack to your Q about the bubble, in absolute vacuum with no gravity, what remains of the former ball-shaped bubble?
A flat object right?
So, when this is applied to the FE'rs belief that Arctic is in center of the earth and Antarctica is the outer rim, then the under-side of the earth must be a massive void...that again can not exist.
Or does the earth carry two different worlds at the same time, one over- and one under-world?
And if this is the presumption, what then of the athmosphere in the under-world being that the earth is travelling through space in an upward motion?