Ibix
Science Advisor
- 13,411
- 15,966
You continue to miss the point. Does space not exist in your walls or outside your room? Of course it does - so in your definition you just assigned arbitrary boundaries (the walls), so I did too (the start and end of the day). Essentially, you defined space as "the gap between two arbitrarily chosen surfaces", so I defined time as the gap between two arbitrarily chosen events. If my definition of time is vacuous, as you contend, then so is your definition of space.sumfor said:Your day is determined by Earth's rotation to which you can assign a time.
Which is kind of the point of operational definitions. We note that clocks are useful and rulers are useful, and that their behaviour implies the Lorentz transforms, which in turn implies that the clocks and rulers are measuring displacements in a 4d manifold with a Lorentzian signature. That's why we say time is the fourth dimension.
Really? What are you planning on breathing today if there's no air between morning and night?sumfor said:And, no, time is not filled with air or anything else.
Last edited: