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I liked your explication of spacetime. It came to grips with the
relationship between mind and reality pretty well. One more item that
should be included is our used of the term "dimension." People talk of
dimensions as if they were places rather than measuring tools. All
dimensions are ways of measuring distance. Height is a measure of the
distance up, width is a measure of the distance 90 degrees away from up, and
length is measured 90 degrees away from both up and wide. Time is just the
distance traveled by the object measured by the other three dimensions
compared to the speed and distance of some other object -- most often the
rotation of the earth.
Therefore dimensions, too, are human constructs used to map the universe we
see inside our brains. They are not places we can venture into. Space is a
place, the measurement of space is not. Dimensions are just ways of looking
at space by comparing one arbitrarily chosen section of it to another.
Again, the comparison takes place in the brain and not in space.
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