In the process of increasing angle of attack of a wing, lift is increasing to a maxima at a certain AOA, then decreasing as this AOA is exceeded. This seems to be the current agreed upon definition of the stall point.
Yet the sharp pitch down and transition of the center of lift to 50% chord does not occur until the top lift pocket completely collapses. Is this the true definition of "stall"?
There is also pre-stall buffeting as high AOA turbulence begins to affect the wing trailing edge.
So, are there really 3 parts to this that a pilot must understand, rather than just one?