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Aren't there many examples, at least in principle? In particular: "Q: The information that gets lost when we go from the Riemann tensor to the Ricci tensor does not affect the energy-momentum tensor nor Einstein’s equations. What is the meaning of this lost information then? A: It means that for a given source configuration, there can be many solutions to Einstein’s equations. They all have the same right-hand side, namely \(T^{\mu \nu}\). But they simply have different physical properties. For example, the simplest case is to ask: what if this energy-momentum stuff is zero? If it is zero, does it mean that there is no gravitation, no interesting geometry at all? No. It allows gravitational waves." Susskind, Cabannes. General Relativity: The Theoretical Minimum. Not according to this: homework and exercises - Non-zero components of the Riemann tensor for the Schwarzschild metric - Physics Stack Exchange

Right. A scalar provides a particular type of covariance. Rank zero. L'(x')=L(x) That's what one must prove in this case.

"Brain-computer-interfaces"/"Neural interfaces" all fake with no uses to us? Looks as if Neuralink is just a euphemism for cybercrime and has no other purposes. More believable is electrodes that attach to neurons of animals, suchas: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3535686/ https://www.nature.com/articles/s41467-022-32775-2 https://www.nature.com/articles/s41565-024-01609-1 "Integration Theory of Consciousness* has thoughts of how to figure out if animals have consciousness. * https://bmcneurosci.biomedcentral.com/articles/10.1186/1471-2202-5-42

All the vaccine does is make you die, you should refuse thus. The solution is to remove pollution from us. Global warming causes trillions of dollars of physical damages, and traffic noise worsens spread of COVID (which causes trillions of dollars of healthcare costs,) how long for our leaders to realize the solutions for air traffic is: outlaw, and for land vehicles: subsidizes to switch to fuelless? Proof that traffic worsens spread of COVID, from our scientist leaders: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8499730/ Proof that COVID causes trillions of dollars of damages: https://healthpolicy.usc.edu/article/covid-19s-total-cost-to-the-economy-in-us-will-reach-14-trillion-by-end-of-2023-new-research/ Proof that global warming causes trillions of dollars of damages: https://climateanalytics.org/publications/carbon-majors-trillion-dollar-damages https://www.nature.com/articles/d41586-022-03573-z The cost of supercapacitors/ultracapacitors was the purpose that fuelless vehicles had huge prices. Solar offers abundant power sources for supercapaciters/ultracapaciters. Scientists now have methods to produce anodes/cathodes from trash (the rest of the capaciter is just carbun, the most abundant of natural resources): https://link.springer.com/chapter/10.1007/978-981-99-9931-6_16 https://www.sciencedirect.com/science/article/abs/pii/S0016236122039497 https://www.nature.com/articles/s41598-017-01319-w