[tsimionescu]

Time is not a dimension in the same sense as the spatial dimensions. It's a coordinate for events, of course, but you can't for example cross from one side of a line on a 2D plane to the other without ever intersecting the line by moving in the time dimension like you can if you have a 3rd space dimension (e.g. by flying over the line).

Even in relativity, the fourth time-related dimension is not of the same nature as the other two (the distance between two points counts the time dimension differently than the space ones).

[PlunderBunny]

By coincidence (?), Futility Closet has just posted an interesting argument by philosopher Ned Markosianto that 'time is not the fourth dimension':

https://www.futilitycloset.com/2024/03/27/sideways-music/

[finally2049]

> you can't for example cross from one side of a line on a 2D plane to the other without ever intersecting the line by moving in the time dimension

Can't you though? Time travel to before the line existed, move over, time travel back.