Dear Sir,
Feynman's advice: "you cannot at all understand quantum mechanics" is correct to a limited extent because of the limitations to our capabilities. But it ignores the fact that if everything is made up of the same fundamental particles, they must follow the same set of physics. This was in the back of his mind, when he added: "shut up and calculate!" This is not because "there was nothing to worry about", but because there was no other alternative than to observe the macro (mathematics is related to numbers and I have shown in my essay that numbers are related to confined objects only) to find the laws for the micro.
The concept of "as if" is nothing new. You have given an example of ratios like a/b with a2 =2b2. Thousands of years of BC, mathematical treatises called Shulba Sootra in India (I have four of them), have described practical applications of such irrational numbers as "Asannamoola", which literally means approaching a limit. They were trying to find solutions to a practical problem: how to draw squares, circles and semi-circles of equal area. They formulated recursive mathematics including the famous Meru Prastara, (later known as Pascal's triangles) and Chakravala, which are foundations of calculus. Boudhayana mentions what is now known as Pythagorus Theorem, thousands of years before him. This tradition was continued till the 17th Century, after which, the Mogul invasion destroyed the whole thing.
Weyl's warning quoted by you: "We are less certain than ever about the ultimate foundations of mathematics", has come true. As you say: "Weyl did not exclude that some correct basics were just not yet found". The problem of the proton and the electron is discussed in connection with the symmetry properties of the quantum laws with respect to the interchange of right and left, past and future, and positive and negative electricity. But are these really symmetric? Symmetry is a feature of a system that is preserved or remains unchanged under some continuous or discrete transformation. Are protons and electrons or past and future or positive and negative charges symmetric?
Protons are always at the center or in nucleus, whereas electrons are at the outer edges or in orbits. If they change position, it becomes neutron, which is different from both. So there is no symmetry. Both past and future are not present at here-now. Whereas you can clearly remember past, you have no clear idea about future. You can only predict future based on causality. But that makes past the cause for future, which is the effect. You can manipulate something in future to resemble something in the past. But that will be limited and not all encompassing like the past events. It will be duplicate - not original. Hence, here also there is no symmetry. Coulomb's Law cannot explain the interaction between a charged body and a charge neutral object, which we come across frequently. The positive charge always radiates out from the nucleus towards periphery and negative charge always confines a positive charge. It is the same even in positron. Hence there is no symmetry here either.
The statement: "Infinite totalities do not exist in any sense of the world (i.e. either really or ideally). More precisely, any mention or purported mention of infinite totalities is literally meaningless", confuses infinity with a very big number. For a very big n, there is always n+1, which is greater than n. But (infinity) 雞・ +1 = 雞・ (infinity). It is because, all numbers must be discrete, whereas infinity is not. There are only four infinities in the universe that coexist: space, time, coordinates and information. But often we mistake while using these. For example, decay is not a function of space or mass, but is a function of energy in cyclic time.
Reality as not the "logical negation of merely abstract ideas". Reality is whatever exists (is subject to measurement), is knowable and is describable in any language. A street has properties similar to a line, but a street is not a line. You cannot draw a street on paper - you can draw only a picture of it, which cannot be used for walking.
All mathematical operations are done at here-now. Zero is not a number as it is not present at here-now. Division of a number by zero is not infinity, as I have shown in my essay. Similarly, x2 + 1 = 0 does not lead to the imaginary number i, for which reason, it has uses in some fields.
Overall, you have tried to introduce a new perspective to the often beaten path. I enjoyed reading your essay.
basudeba