Well, it turns out that Einstein and Kaluza and many others worked on trying to refine this framework and apply it to the physics of the universe as was understood at the time, and, in detail, it didn't work.
Tuleb välja, et Einstein ja Kaluza ja paljud teised nägid vaeva püüdes seda raamideed täpsustada ja rakendada universumifüüsikale nii nagu seda tol ajalt tunti, kuid pisiasjus see ei toiminud.