The principle of equivalence in general relativity conflicts with the principle of superposition in quantum mechanics, highlighting a fundamental tension between these two theories.

The quest for a theory of everything that unifies general relativity and quantum mechanics may not yield a simple equation, as gravity might emerge from quantum phenomena at a macroscopic level.

The strength of geometric algebra lies in its ability to unify various concepts in physics, including quantum mechanics and relativity, potentially offering new insights into quantum gravity.

Defining energy in general relativity is complex; pseudotensors can provide conservation but break covariance, while covariant definitions work under symmetry but fail in general spacetimes, hinting at a deeper structure yet to be universally interpreted.

Einstein introduced the pseudotensor to represent the energy of the gravitational field, but it depends on chosen coordinates, which contradicts the principle of general covariance.

In flat spacetime, energy-momentum conservation is straightforward, but in General Relativity, it becomes complex due to the need for a covariant derivative and additional machinery.

The energy associated with gravity is coordinate-dependent, raising questions about whether this is a valid justification for using the pseudotensor.

I believe it's possible to unify general relativity and quantum mechanics, as history shows that physics has often moved towards unification, like how Maxwell unified electricity and magnetism.

We haven't unified quantum mechanics and general relativity yet because we don't know what the fundamental objects are, and we need to rethink our notions of space and time.