By David Z. Albert
Right here the thinker and physicist David Z Albert argues, between different issues, that the variation among earlier and destiny should be understood as a mechanical phenomenon of nature and that quantum mechanics makes it most unlikely to provide the whole lot of what could be stated in regards to the international as a story of “befores” and “afters.”
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Extra info for After Physics
Call this inference by measurement. The Difference between the Past and the Future 37 Inference by measurement is so called because it is modeled on the logic of measuring instruments: Measuring instruments (that is) are the sorts of systems which reliably undergo some particular transition, when they interact in the appropriate way with the system they are designed to measure, only in the event that the measured system is (at the time of the interaction) in one or another of some particular collection of physical situations.
We are going to want to make certain—as with the algorithm for evaluating counterfactuals—that whatever particular fiction we choose does not introduce any new asymmetries of its own between past and future.
Consider (for example) the case of the billiard balls. If I happen to know that billiard ball number 5 was moving ten seconds ago, then I need know no more of the present state of the entire collection of balls than that billiard ball number 5 is currently at rest in order to conclude that billiard ball number 5 has been involved in a collision over the past ten seconds. But how is it that I ever do happen to know that billiard ball number 5 was moving ten seconds ago? Presumably by measurement.
After Physics by David Z. Albert