If you consider nature and sides, having seen one side, one could consider that the other side is similar to it, and fully spherical too. That would be most natural. So not having seen the other side, I assume that the other side is as spherical and similar to the side we see. If one has half an orange and the other is missing, he can assume that the missing half was similar. It would be unnatural for oranges and objects like the Moon or Earth or Jupiter to be in odd halves.
I respect that you are geocentric; sorry I missed that.
You say "having seen one side, one could consider that the other side is similar to it, and fully spherical too." On the other hand, having seen one side we cannot tell if it is a sphere or not. Although it goes against millenia of Egyptian/Freemasonic programming, it could be flat or it could be a sphere.
I make no assumption about the supposed "other side." It may be flat or it may be a sphere. Our unstated basic assumptions will cause us to lean toward either flat or sphere.
Somtimes we have to overcome our unstated basic assumptions about the world in which we live, considering the many lies we've been told. You know that because you are not heliocentric.