Quote Originally Posted by Honeybadger400 View Post
Imagine the universe as shaped like a donut. The top side of the donut is “space-time”, our familiar 3 dimentions of space and 1 dimension of time. The bottom side of the donut is also familiar to us, though we seldom think about it. It is “time-space” (aka 3 dimensions of time, 1 dimension of space). The three dimensions of time in time-space are “past, present, and future”
This does not make any sense from a mathematical point of view, outside a "universe as shaped like a donut" is not part of that universe.
I totally don't get why “past, present, and future” are separate dimensions. Seems to me that 'present' is but a point. All three of these are already accounted for in "space-time" with but a single dimension.