Causal News

NO

Pilot Action: Pilot action was a primary cause of the crash.

Design/Manufacturing Defect: A Boeing design or manufacturing defect was a primary cause of the crash.

YES

YES

YES

YES

Gravitational path integral of metric field

Gravitational path integral of gauge variables (e.g., spinfoam models)

Causal set

AdS/CFT

Canonical loop quantum gravity

Quantum geometrodynamics

YES

YES

Causality can't be violated, even in principle

Special relativity is falsified.

YES

It cites Hartle (1992) "Spacetime quantum mechanics and the quantum mechanics of spacetime".

It acknowledges that the path integral formalism allows the accommodation of indefinite causal structure for quantum gravity.

It presents the "process matrix formalism" as a promising framework for studying indefinite causal structure for quantum gravity (whether or not this is the case).