Quantum mechanics arose in the 20th century when people were trying to explain certain paradoxes that arose in atomic physics. I believe that if you think deeply enough about certain experimental results such as the double slit interference and atomic spectra , You will find that it is very hard to avoid quantum mechanics. But my question is whether there is a more fundamental reason that quantum mechanics must be true. Is there a more fundamental theoretical reason that will force us to accept quantum mechanics as true ?