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Time real or not

  1. Nov 19, 2014 #1
    There appears to be an ongoing bias towards the existence of time as a dimension. Yet clearly there is an ongoing argument within the scientific community about it's existence. What are the arguments for and against times existence, As even after extensive reading including
    Einstein-Minkowski Spacetime. and other related theories over the last 4 years most of the theoretical constructs appear to point clearly towards it's non existence.
     
  2. jcsd
  3. Nov 19, 2014 #2

    russ_watters

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    Welcome to PF!
    I'm not sure "bias" is the right word, but yes, the mainstream science position is that time is a dimension.
    I don't think that's true. Could you provide examples of such discussion?
     
  4. Nov 19, 2014 #3

    A.T.

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    Time is a dimension in some geometrical interpretations of physical theories. Whether that constitutes "existence" is a purely semantical question, not a physical one.
     
  5. Nov 19, 2014 #4

    Doug Huffman

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    Smolin vs. Susskind. Smolin's advocacy of a background-independent physics. Smolin's https://en.wikipedia.org/wiki/Time_Reborn
    • All that is real is real in a moment, which is a succession of moments. Anything that is true is true of the present moment.
    • Everything that is real in a moment is a process of change leading to the next or future moments. Anything that is true is then a feature of a process in this process causing or implying future moments.
    Smolin asks that time as essential and space as emergent be considered.
     
  6. Nov 19, 2014 #5

    bhobba

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    Physics is a mathematical model. Time is naturally modelled as a parameter in our equations - I wouldn't call such a bias.

    And of course it exists - clocks exist, and time, in physics, is what clocks measure.

    Does it emerge from something deeper - quite likely IMHO - but I don't think there is any kind of consensus right now on exactly what that is.

    Thanks
    Bill
     
  7. Nov 19, 2014 #6

    bhobba

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    I think such metaphysical gobblely gook illuminates nothing.

    Time is simply what a clock measures - nothing hard about it.

    Thanks
    Bill
     
  8. Nov 19, 2014 #7

    Nugatory

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    Bhobba is right. As far as science (which is what we talk about here) is concerned, it really is that simple.

    Time to close this thread.
     
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