How, though, will things look, if cause and effect occur on one single object? Certainly it can't be excluded that an electron might eventually interfere with its own magnetic field (which should be the case for our atomic model). In other words, do we really want to deny the existence of the magnetic field for this specific case?

That is simply impossible, since by experience we all know the classical term of self-induction. This physical effect, applicable to the movement of a group of electrons following the magnetic field theorem, should also apply to a single particle. This conclusion can immediately be derived by using the fact that in a group of electrons a single electron cannot be distinguished from the other ones. Therefore, let us consider one single electron of this group. It generates (like all the other electrons) the magnetic field. And as is well known, the partial magnetic field generated by this single electron affects all the other electrons. But because the electrons are indistinguishable from each other, the "partial magnetic field" must also react to its generator, quod erat demonstrandum

Now let's extend still another theorem that we have just mentioned. What will happen, if cause and effect occur on one electron and have to be controlled? Of course a control is no longer possible because any intervening operation upon this mechanism would inevitably lead to changes. This is the real content of the Heisenberg uncertainty principle, namely that Planck's quantum of action provides an "intervention limit".

Therefore, we can deduce that:

1. the application of the Biot-Savart law must fail because it was based on false assumptions,
2. the unknown principle to be discovered can only be as follows:

That is why it is first an action (effect) and secondly a quantum and why quantum laws cannot be measured but rather have to be guessed!