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By Einstein's definition, time is what clocks measure – but how can we define “clock” without referring to time? This tag is for such philosophical questions about the many unresolved issues concerning time. Though this includes questions about the interpretation of physical theories and concepts, if your question is about what current physics can quantitatively predict or explain, it is probably not about philosophy and therefore off-topic.

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Time travel and changing the past

Well I wanted to share my point of view of time travel I like physics so this is how I look at it: All of this is from my original thougths, so just my opinion. Is time traveling possible? … When you travel in time the only reality that exists is what the traveler experiences as present, Imagine like a youtube video in which you can go forwards or backwards, but when you go backwards you destroy …
Fuel's user avatar
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Is time more "real" than math and, if so, why?

How is time different from math? Is time a part of math? For me time is like math rather than a "real" thing. Time is just a tool rather than a "fundamental thing". … interactions, time is like language a word we use to have a frame of reference in order to be more precise when we predict the future so animals don't see time they only see the interactions of stuff …
Fuel's user avatar
  • 89