The square root of the probability, 5
If there is more than one way to achieve the present state, present == sum over all possible pasts, with weightings.
This is false for a physical state. This is only true for wave functions, which are NOT probabilities.
Wave functions are used for calculating probabilities; but they are not themselves probabilities.
Wave functions are quantum states, but not physical states.
Wave functions are logical and mathematical, but not physical.
A physical state is something observable, something can be measured, at least in principle.
A physical state is something that exists in spacetime, a wave function is not.
— Me@2021-01-16 06:12:08 PM
2021.01.17 Sunday (c) All rights reserved by ACHK