NOT including the prediction capabilities of the particular math equations of GR or SR. In particular, hard evidence such as, or close to; here's an electron, because we measured it directly, or saw it in an electron microscope. Or heres a cell under a microscope. Or this is a brain scan/MRI etc of persons on LSD-25, these regions of the brain are active during lsd. Or heres x-chemical in this plant, because we analysed it in a GS-MS. Or this star emits x-form of electromagnetism. etc.. On this basis, *Is there any basically direct measurements/hard evidence of the curvature of spacetime? *Is there any basically direct measurements/hard evidence of the lack of mass in a proton? And if so, what is it?