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But laws do not have to be universally true. A law is valid within a
range of application such as the ideal gas law. Herein lies the confusion.
People tend to think a law is "universal truth" when the word law is
merely an expression of the usage and derivation of the equation or priciple.
Should F_f= mu F_N be a law? Why not it is just as valid within its
range of application as Ohm's law or Newton's law of universal gravitation.