"OK. You are completely stuck. Without changing most of what you have said. you can not say that Feriggio's partner Kohler, her foot isn't as far back behind her onto the tip of the toe, just about as far as it is possible to go."
And there is the issue - how far it is possible to go VARIES DEPENDING ON THE SPECIFIC STEP BEING PERFORMED!
There is no one stock answer for all backwards TH steps. Notice how different the forward's partner's action is throughout a feather! The backwards partner's action will also be as different - though the foot will do TH in each step, is is a very differnet meaning of TH in each case!
"Her weight is forward towards her partner."
Towards her partner, yes. But her weight must be MOVING BACKWARDS - if it is not, then she must be STADNING STILL AND NOT MOVING.
"You said . You cannot stay over the ball of the foot and also be moving. This is where you need to think a bit harder."
No, its where you need to wake up and smell the obvious. You can't move your body without moving your body! And if you move it, it's no longer going to be over your foot.
"You seem to think that we have two stationary feet."
That does not follow at all. But you are forgetting that the STANDING FOOT is forced to be stationary. It can articulate, but it can't move. As a result, a moving body will have to pass beyond it - or stop moving.
"We have a table tennis ball on a train travelling at a 100k's. We drop the ball onto the table. it bounces straight up and down hitting the table twice in the same spot one second apart. What is really happening is it is bouncing some forty meters apart."
Yes, but unlike your foot, the table is moving. If you wish to dance your feaether step while standing on a skateboard you can keep your body over your standing foot. But if you wish to do it while dancing on the floor, you CANNOT.
"That only a complete idiot would try to instruct a beginner to send the body in front of the front moving foot and fall onto the next step."
There's the problem - you are still thinking about dance as a beginner would. Time to grow up and get serious, time to learn the real story.
"I take it that means falling past her front leg to her rear."
At the appropriate time in the action, yes. Only the aim must take her not only onto the foot, but smoothly through it.
"I ask you again . Do you really believe you should be writting like that when people who are comparative learners are maybe reading ."
I am writing about the truth. If you are not ready to handle it, that is your problem. One should probably not be trying to teach foxtrot to a beginner anyway, as they will not have the physical strength yet to learn to dance it in a way that will build good habits. If they were to attempt it at all, they would either be off time, or have lots of pauses in the movement. In fact, that sounds very familiar - your problems is that you've been taught bad habits as might enable a beginner to fake foxtrot - but you've never actually learned to do the dance right!
You must SUSTAIN THE MOVEMENT. And for that you will need much stronger feet.