This is a fascinating topic. I once poked about in Physics where I became fascinated by the idea of Time. The experiment then is to find out what time consists of. So a pendulum clock is a mechanism with a dial on the front marked in equal divisions, and inside the engine that causes it to make the 'tick-tock' sound. I could have used a SunDial but that would have required me to bring in all sorts of astronomy stuff that I don't get. Anyway, the bits in the clock that rotate are governed by the pendulum which waves from side to side having been egged on by the effect of the weights which keep the thing going. Now that I think I know what is going on inside the Clock I wish to assert, Time is not a thing of any essence like a piece of wood. It is in fact just a controlled change of spacial things which we have elevated. In a way Time is just regulated spacial change, nothing more. So when we state that velocity is change of distance over time, D/T, we are really just asserting one change of location per unit of a regulated change of location. Now the idea that Time can go in another direction is an abstraction from our understanding of regulated spacial change, IOW we are asserting that SOME spacial change does not go the way we perceive it. Indeed that is what happens in some experiments where the observer is reported to cause a change in the data simply by observing it. Nevertheless it is not the case that Time has its own essence, only that it borrows its nature from a spacial regulated change of which it is made. Off topic, there is a lovely story about Albert Einstein conducting a mental experiment. In it he has a man on a train to go East to West passed a man on a station platform. As the train passes two lights are caused to glow at the same moment - in platform time that is. However on the train the man sees the first light as brighter than the second because of the way light waves behave, And so relative to the man on the train the physical events are NOT the same, while to the man on the platform they are identical. Those considerations led Albert into complex mathematics where he works out some of his theories. Perhaps Donuel's example is the start of yet another amazing revelation about change in our universe?
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