What is “Energy,” Actually? [Graduate Level]

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Veritasium pointed out that energy isn't conserved, but here I argue something further: energy is not even well-defined!

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Here are some other of my videos you may enjoy:
- Why the so-called proofs that light "takes all possible paths" is faulty:
- Gödel's incompleteness theorem explained / pop sci accounts debunked:
- Why you shouldn't always demand ELI5 explanations (or assume someone who can't deliver simplified explanations lacks an understanding):

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Links Mentioned:
•⁠ ⁠Neil deGrasse Tyson on TOE:
•⁠ ⁠Killing Field:
•⁠ ⁠Götterdämmerung Events and a Rant Against Us Being in a “Typical Universe”:
•⁠ ⁠What is energy, actually? (article version):
•⁠ ⁠Schwarzschild metric:
•⁠ ⁠Claudia de Rham on TOE:
•⁠ ⁠Ted Jacobson on TOE:
•⁠ ⁠Sonya Aoki’s paper:
•⁠ ⁠Isaacson stress-energy tensor:
•⁠ ⁠Bel-Robinson tensor:
•⁠ ⁠Differential geometry:
•⁠ ⁠What is light?:

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