SYB_DC
Striker
Yes, but only between one set of points - the rim of the circle. The Earth has been circumnavigated in a wide array of ways, including via the poles, which I take it is something you believe is impossible because I believe your model inherently holds that there is no South Pole.Horizontally, yes.
It depends on how each person wants to look at it.
No need for any apologies. Just keep to your narrative.
Pilots know they fly over level, not curvature.
You do know you can circumnavigate a circle, right?