Time is the most familiar thing in the world. Is the present what's left when you subtract what has already happened, and what is yet to happen? Then it seems to vanish into a mere instant. Are future events completely unreal? Or are they just the things we can't know yet? Is time unreal, as many people have thought?
Is the future real? What happens to the present moment when it becomes past? Does the present depend on thought? Is the flow of time just a human construct? Begins by suggesting that we think of the “now” like we think of “here”, that is, “here” is wherever I am and “now” is whenever I am thinking. Our intuitions say that space and time seem fundamentally different. For example, we have sense experience access to different points in space, but we do not have such access to time.
If time could be real in experience but not objectively real. and describes the problem of the direction of time in the foundations of physics in terms of billiard balls hitting. The point is out that most theories of time are symmetric while our experience of time is asymmetric. What it would mean for time to move faster? Rate is measured in terms of time.
Is time travel possible? It seems like if you could travel back in time, you couldn't do anything to change the causal history of the world. Came up a solution to the equations of relativity that says time travel is possible. This leads to the grandfather paradox, that is, if you could travel back in time to kill your grandparents then you would prevent yourself from traveling back in time. describes an interpretation of time as relative change in things. and how if our perception of time gets at some objective thing in realty, then could there be creatures that cognize time differently than we do. Lets start thinks natural selection likely ensures that all creatures worry about arranging future events more than past ones.
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