I really like the presentation in one of Lev Landau's books. He calls it a fictitious 4-dimensional space. That's the correct way to look at it, spacetime is ju

I really like the presentation in one of Lev Landau's books. He calls it a fictitious 4-dimensional space. That's the correct way to look at it, spacetime is just a mental model, a tool for describing physical laws. So depending on the mental model or framework we decide to use, time can be a dimension or something completely different.