NFHS pitcher's 'step' back

[okla21fan]

Originally Posted by shipwreck

A step back may be taken, but the motion backward must start before the hands come together. If there is any motion backward before the hands come together, it is legal. Dave

Does this step backward have to be completed before the hands come together? (like I said in the OP, the hands coming together and the step backwards were happening nearly at the same time and both, were what I was considering part of the wind up)

I guess I am not following the logic (or even intent) of this requirement.