[Mathew]

A stationary head is an ideal... correct? Hogan's head was not fixed ...it moved a little back on the backswing and forward and down on the downswing transition. Maybe it was stationary relative to the rest of his body motion during the backswing to downswing transition.

Many of the golf greats may or may not moved very very 'slightly' in certain slow mo pictures, but their intentions are towards the ideal are very clear and it certainly can be done. Many mistake the look of turning the head even though its still stationary as defined by a fixed point in space as the head as though it was moving backwards to the right. This is because the head is not shaped like a soccer ball...

Really all the golf stroke requires is some point on the top of the spine to stabilise the motion, yet the head is preferable because you can use your eyes to monitor if it has moved....there is no other point you can use that has anything that can match that advantage(ie point between the shoulders).