I have a question about timeless physics. If the future state of the universe is only based on the current state with no reference to time then what determines how much the universe changes from state to state? Removing time seems to reintroduce Zeno's paradox. Either the universe changes in discrete steps or something else has to keep track of how much the universe changes at each step and the only way I can think of to measure how much it changes is a derivative with respect to "time".
Any better insights?
Do you think continuous spatial + temporal dimensions have problems continuous spatial dimensions lack? If so, what and why?
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