The discussion centers on the concept of time as a dimension akin to space, asserting that moving "backwards" in time lacks meaning, similar to moving "backwards" in space. Participants argue that regardless of direction, motion is always forward, and that returning to a starting point does not equate to moving backwards. The conversation also touches on closed timelike curves (CTCs) in general relativity, suggesting that while CTCs are theoretically possible, they introduce paradoxes that challenge our understanding of time travel. The discussion concludes with the assertion that time travel, as commonly understood, is not feasible.
PREREQUISITESThis discussion is beneficial for physicists, students of theoretical physics, and anyone interested in the philosophical implications of time travel and the nature of time itself.
I don't understand what you mean. I am not treating the universe as having six dimension. A dimension by definition is a plane that is completely perpendicular to all the other planes. Ok, not exactly the greatest definition but you get the point.nealh149 said:Flatland, you are treating this problem like the universe has 6 spatial dimensions. This isn't the case there are only three. You can move positive and negative in each of these directions. YOu're acting like moving negative along the horizontal is like moving positive in a totally separate dimension.