I cant really wrap my head around what it is and how if it is possible.
In: 6
If there is a 4th dimension, then us having a 3D-perspective means that by definition we wouldn’t be able to view 4th dimension.
* 1st dimension viewpoint = tunnel vision. 2D would be around the tunnel (on the same horizontal level). You could see something appear and then disappear, which in fact happens to be a train cutting **across** the tunnel (not through it).
* 2nd dimension = like living **within** a piece of paper (360-degree **horizontal** view). But someone with this viewpoint would have no concept of higher or lower. A pen being pushed through the paper by a higher-dimension person would, to the 2D person look like something appearing and then disappearing in the horizon.
3rd dimension = complete 360-degree horizontal and vertical view. On this bases, I’d guess a 4th-dimension being would be outside the 3d realm and so would have a concept of being able to “move in and out of” the 3d dimension which, to ourselves would look like someone appearing and disappearing.
But how they are able to do this would be incomprehensible (intuitively) due to our limited perspective. Though we may be able to work it out through physics and maths etc.
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