Reductionism has been popular throughout the history of mankind, from ancient Greek philosophers to modern thinkers. It is no wonder that, at the dawn of last century, people hastily asserted that, physics were going over, because all the fundamental laws had been found. This assertion was soon overthrown, due to the discovery of relativity theory and quantum mechanics。 Three decades afterward, Dirac claimed again that, all chemistry could be captured in a single equation (Dirac equation). Nonetheless, as emphasized by Anderson, that reductionism is too naive and too optimistic for the human's intelligence. The real world is so complicated that, its actual behaviors can hardly be comprehended directly through pure deduction starting from some fundamental laws. Such pure deduction is too difficult for us humans. Thence, Anderson put forth the co-called 'emergent phenomena', which are deemed as elementary as particle physics.
To be honest, one should realize that, however extensive investigations have been conducted, only a very small portion of universe has been actually studied. Our knowledge thus obtained are therefore, in its most direct sense, only about this small portion. Applying our knowledge to any other objects is only a trial, although we hold the belief that, physical laws should be universal. But remember that, it is no more than a belief. In this perspective, our knowledge, however strong our faith in its universality may be, can serve no more than a reference. They are references, rather than answers.
Pushing this argument to its uttermost, I'd like to state that, "Any piece of universe should be deemed a prior having its own separate science, although different pieces may actually share something." A molecule, a junction, an ion, the universe as a whole, all may have their own physics. Look at a molecule. Some people may say that 'quantum mechanics are underlying its properties', but how do you infer its properties from quantum mechanics ? Before this question is answered, that saying will be merely a guess. Remember that, quantum mechanics may provide a good starting point for you to understand the molecule's properties, it is not the answer. It is a reference, not an answer. Quantum mechanics, as other empirical facts, may give you a clue to find out the answer, themselves being not answers.
So, any object may have its own physics.
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