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There may actually be a 4d spatial dimensions - infinite in size compared to our 3d spatial dimensions, so don't count them out. (and I assume this because our 3d spatial dimesions are infinite in size compared to 2d spatial dimensions - that is we cannot discover 2d flatlanders, because the flatland, having 0 depth in our dimension, takes up 0 volume)
I view time as an uncontrollable dimension of movement.
We have control over the other three, but time, we are constantly being forced forward. Maybe time is the 4th spatial dimension. If you take all of time that ever existed, it is infinite in size compared to our "now" point in time. By spatial movement, it's hard to describe, but you'd sort of be phasing in and out of different points in time, and as time changes, the space you occupy changes as well (with respect to time).
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Well no
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Penrose's singularity theorem
In his book The Road to Reality: A Complete Guide to the Laws of the Universe, scientist Sir Roger Penrose explained his singularity theorem. It asserts that all theories that attribute more than three spatial dimensions and one temporal dimension to the world of experience are unstable. The instabilities that exist in systems of such extra dimensions would result in their rapid collapse into a singularity. For that reason, Penrose wrote, the unification of gravitation with other forces through extra dimensions cannot occur.
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Time is a temporal dimension and is seperate hence einstein physics
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Privileged character of 3+1 spacetime
Dimensions are of two kinds: spatial and temporal. That spacetime, ignoring any undetectable compactified dimensions, consists of 3+1 dimensions (ie three spatial (bidirectional) and one temporal (unidirectional)), is often explained by appeal to the mathematical and physical effects of differing numbers of dimensions. Most often this takes the form of an anthropic argument.[/b]
If time was what you said all of einstein physics would break down.
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The psychological arrow of time is thought to be reducible to the thermodynamic arrow: it has deep connections with Maxwell's demon and the physics of information; In fact, it is easy to understand its link to the Second Law of Thermodynamics if we view memory as correlation between brain cells (or computer bits) and the outer world. Since the Second Law of Thermodynamics is equivalent to the growth with time of such correlations, then it states that memory will be created as we move towards the future (rather than towards the past).[/b]
Time is a temperal dimension and it appears to go forward because of the second law of thermodynamics, put it this way if time was actually going backward how would we know.
As i saying over again time is not a spartle dimension it a temporal if it was a spartle dimension then the whole of einsteinian physics would be thrown out of the window.