Thank you. From the threads i was reading, I am not convinced how things work out here (what again was confirmed by the link you sent). There are some users that neglect many threads in the first place. Science is not "having evidence or references", this is hen egg thinking. Science is...
I have just simple Knowledge, but recently a question came To my mind.
An Entity Living in 2d Space cannot Directly Observe a sphere, but rather a Circle Changing its Size when a sphere is traversing trough the observable 2d plane.
Similar, a 4d sphere would Appear To us as 3d sphere Changing...