The Law of Causality has played a key role in the development of science through the ages. It basically says that nothing happens without something causing it to occur. Newton's First Law of Kinetics (Law of Inertia) is a prime example. It says that a body will continue in a straight line at constant speed until it is subject to an unbalanced external force. By extension, each of the physical properties of the same object will remain constant indefinitely unless some outside force is applied. For example, the rate of such a (inertial) clock will not change unless it is acted upon by some outside force (clock-rate corollary). That being the case, one must conclude that the ratio of the rates of any two such clocks will be a constant. In other words, when these clocks are used to measure an elapsed time, their different values t and t' will always be found to be in the same ratio, i.e. t'=t/Q, where Q is the rate ratio.
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Robert J. Buenker (2022) studied this question.