Also you quote the wrong phrase of mine. I never said you don't understand signal processing. I'm thinking of either you lack the knowledge or you lack the critical thinking. Those "think about"s are just directing you to find out the answer. If you know what you are talking about, you will get the answer very quickly.
I can assure I do not lack the critical thinking. All I am asking is evidence that simpler tests cover more complex situations. So, yes, my knowledge is lacking and I would like this to be remedied. As Alan said, yes "we do IMD" and other tests. I have not seen evidence these tests are sufficient. I did not say they are not sufficient - I want to know.
Regarding my rude comments to Amir, well, on that I was out of line and
I apologise to Amir, but speaking in a more polite way, the fact remains that the validity of his methodology is debated, and inconsistencies have been pointed out here as well. So, please show me papers that prove that simpler tests allow us to bound distorsions in all cases. I am
eager to learn.
I am a professional mathematician and I can read those papers. I am not mentioning this to brag, but it was just to mention that you can point to me to real studies. Taking about "32 waves that go up and down", as Alan did, is puerile at the very least. My current job is easy to find, and I have a global responsibility where, if I do a mistake, literally billions of people may be affected. In the past a slip of mine led to a potential 900 million devices being vulnerable. I have experience being wrong and owning it. What I do not accept is "you have no clue", a salad of buzzword (all of which I know well) and then being dismissed.
Returning to critical thinking, using (1) measurements that prove that devices are not ideal, and then (2) claiming that you can extrapolate from these measurements in an ideal way
is a logical fallacy, and not one I have done. [OTOH I can accept even heuristic arguments that combined distortion byproducts are so low that they fall under the noise floor, and therefore they can be ignored.]
I started on the wrong foot. Mocking (as Alan did) repeats my mistake, I gave a bad example.
Roberto