# Is classical mechanics philosophically sound?

• B
2019 Award

## Main Question or Discussion Point

But the usual interpretations of "uncertainty" and "approximately" are subjective.
They are subjective even in the classical, nonrelativistic mechanics of a pendulum, since the notions appear when you try to relate the theory to a real pendulum. In classical, nonrelativistic mechanics, the interpretation of the words ''observation'', ''experiment'' and ''measurement'' needed to build a proper bridge between classical theory and reality are also subjective. (The respective definitions in the wikipedia pages linked to contain many unexplained words whose meaning is as subjective as those of the above two words, or even more.)

So why do you regard classical, nonrelativistic few-particle mechanics as philosophically sound, but complain about foundational problems in quantum mechanics?

Last edited:
Jilang

Related Quantum Physics News on Phys.org
Subjectivity as you yourself say has some explanation in Classical mechanics which works with some axioms like point particle etc. But subjectivity in QM does not have any explanation may be classical explanation!

stevendaryl
Staff Emeritus
They are subjective even in the classical, nonrelativistic mechanics of a pendulum, since the notions appear when you try to relate the theory to a real pendulum. In classical, nonrelativistic mechanics, the interpretation of the words ''observation'', ''experiment'' and ''measurement'' needed to build a proper bridge between classical theory and reality are also subjective. (The respective definitions in the wikipedia pages linked to contain many unexplained words whose meaning is as subjective as those of the above two words, or even more.)

So why do you regard classical, nonrelativistic few-particle mechanics as philosophically sound, but complain about foundational problems in quantum mechanics?
I don't have any problems with things being subjective. I was just objecting to your claim that using "expectations" instead of "probabilities" makes any difference, in principle.