Your question is framed in a nonsensical way. Net energy, heat, always flows from warm to cold.
So you keep saying...but you don't seem to be able to come up with an observed, measured example of it...what you come up with in spades is evidence that you are easily fooled by instrumentation.
And if all this were as simple as your "mind" experiments suggest, surely there would be observed, measured examples...we both know that there aren't...because your mind experiments are terribly flawed.
What a confusing statement this is:
"Net energy, heat, always flows from warm to cold."
How does it become net when energy flows in ONE direction from high to low, hot to cold and so on.
I am sorry you are so easily confused.
All heat is energy but energy is not always heat.
This conversation is mainly concerned with radiation. Radiation does not need matter to transport energy, only to produce it and to accept it. Unlike conduction and convection.
Therefore energy via radiation can, and does, travel in both (all) directions at the same time. Matter mediated energy transfer is only in one direction, at the level of the net competing energies.
SSDD thinks the temperature of the first object controls the production of radiation in the second object. And vice versa.
Alas it is you who is confused ian. You are confused at the most fundamental level and that error trickles up into, and pollutes your more complex ideas...
And again, it isn't what I think...it is what the physical law states. Once again......change the difference between T and Tc and P changes. There is no expression for net within that equation. Your notion that all matter radiates according to its temperature only applies if that matter happens to be a perfect black body perfectly alone in a perfect vacuum...the fact that you can't admit your error on that basic fact pollutes every thing you have to say on the topic.
That equation is stating that the net power transferred between two objects is the power of object(1) minus the power of object(2).