I am new to this forum and are still yet to read TGM so maybe my comment will be redundant.
One problem with golf instruction seems to be an ambiguity of terms. From reviews I have read to date TGM seeems very technical which I think sounds great as this simplifies rather than complicates things.
I think one should be technical with biomechanical terms and avoid terms such as wrist cock.
In biomechanics the wrist can flex, extend or abduct (radially or ulnaward). It can of course do a combination of these motions.
With ones elbow at 90 degrees and forearm and palm on a flat surface (palm down) extension lifts the palm off the surface , flexion is the opposite, radial adbuction moves the palm to the thumb side and ulna abduction to the little finger side.
The forearm rotates on its axis (which is the middle finger with some exceptions). Pronation is palm down, supernation palm up. One can fake forearm rotation by rotating at the shoulder.
Anyway I think descriptions would be easier if there was a consistent use of terms.
This is probably covered in TGM and I am looking forward to the read.
I assume the commonly refered to wrist cock is in fact radial abduction with the wrist in neutral flexion/extension.
Threaded Mode
