Feynman at the Nobel Banquet 1965: I think I can safely say that nobody understands quantum mechanics...I don't know anything about the Nobel Prize, I don't understand what's it all about or what's worth what. If the people in the Swedish academy decides that X, Y or Z wins the Nobel Prize, then so be it. I won't have anything to do with it. It's a pain in the neck...ha..ha..hah...If someone tells you they understand quantum mechanics then all you’ve learned is that you’ve met a liar.
Lubos Motl behind The Reference Frame does not like the questions about the physical meaning (foundation) of quantum mechanics being posed by the Spanish physicist Pablo Echenique-Robba in the article:
- Shut up and let me think. Or why you should work on the foundations of quantum mechanics as much as you please,
- The universal postulates of quantum mechanics, its probabilistic, proposition-based character, and its intimate connection with linear algebra are the main targets of the Spanish crank's assault when it comes to the ideas..
- Richard Feynman, Niels Bohr, and the authors of almost all textbooks of quantum mechanics are victims of his ad hominem attacks...
But the questions remain and "shut up" is not an answer, in particular not a scientific answer.
PS For more on my views on quantum mechanics see Dr Faustus of Modern Physics, Many-Minds Quantum Mechanics and Quantum Contradictions 1-20.